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authorTim Redfern <tim@eclectronics.org>2014-02-17 13:36:38 +0000
committerTim Redfern <tim@eclectronics.org>2014-02-17 13:36:38 +0000
commit22e28216336da876e1fd17f380ce42eaf1446769 (patch)
tree444dad3dc7e2656992d29f34f7bce31970c122a5 /ffmpeg/libavcodec/vp3.c
parentae5e8541f6e06e64c28719467cdf366ac57aff31 (diff)
chasing indexing error
Diffstat (limited to 'ffmpeg/libavcodec/vp3.c')
-rw-r--r--ffmpeg/libavcodec/vp3.c2492
1 files changed, 0 insertions, 2492 deletions
diff --git a/ffmpeg/libavcodec/vp3.c b/ffmpeg/libavcodec/vp3.c
deleted file mode 100644
index 626642f..0000000
--- a/ffmpeg/libavcodec/vp3.c
+++ /dev/null
@@ -1,2492 +0,0 @@
-/*
- * Copyright (C) 2003-2004 the ffmpeg project
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * On2 VP3 Video Decoder
- *
- * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx)
- * For more information about the VP3 coding process, visit:
- * http://wiki.multimedia.cx/index.php?title=On2_VP3
- *
- * Theora decoder by Alex Beregszaszi
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "libavutil/imgutils.h"
-#include "avcodec.h"
-#include "internal.h"
-#include "dsputil.h"
-#include "get_bits.h"
-#include "hpeldsp.h"
-#include "videodsp.h"
-#include "vp3data.h"
-#include "vp3dsp.h"
-#include "xiph.h"
-#include "thread.h"
-
-#define FRAGMENT_PIXELS 8
-
-//FIXME split things out into their own arrays
-typedef struct Vp3Fragment {
- int16_t dc;
- uint8_t coding_method;
- uint8_t qpi;
-} Vp3Fragment;
-
-#define SB_NOT_CODED 0
-#define SB_PARTIALLY_CODED 1
-#define SB_FULLY_CODED 2
-
-// This is the maximum length of a single long bit run that can be encoded
-// for superblock coding or block qps. Theora special-cases this to read a
-// bit instead of flipping the current bit to allow for runs longer than 4129.
-#define MAXIMUM_LONG_BIT_RUN 4129
-
-#define MODE_INTER_NO_MV 0
-#define MODE_INTRA 1
-#define MODE_INTER_PLUS_MV 2
-#define MODE_INTER_LAST_MV 3
-#define MODE_INTER_PRIOR_LAST 4
-#define MODE_USING_GOLDEN 5
-#define MODE_GOLDEN_MV 6
-#define MODE_INTER_FOURMV 7
-#define CODING_MODE_COUNT 8
-
-/* special internal mode */
-#define MODE_COPY 8
-
-static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb);
-static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb);
-
-
-/* There are 6 preset schemes, plus a free-form scheme */
-static const int ModeAlphabet[6][CODING_MODE_COUNT] =
-{
- /* scheme 1: Last motion vector dominates */
- { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
- MODE_INTER_PLUS_MV, MODE_INTER_NO_MV,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 2 */
- { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
- MODE_INTER_NO_MV, MODE_INTER_PLUS_MV,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 3 */
- { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
- MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 4 */
- { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV,
- MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 5: No motion vector dominates */
- { MODE_INTER_NO_MV, MODE_INTER_LAST_MV,
- MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV,
- MODE_INTRA, MODE_USING_GOLDEN,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
- /* scheme 6 */
- { MODE_INTER_NO_MV, MODE_USING_GOLDEN,
- MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST,
- MODE_INTER_PLUS_MV, MODE_INTRA,
- MODE_GOLDEN_MV, MODE_INTER_FOURMV },
-
-};
-
-static const uint8_t hilbert_offset[16][2] = {
- {0,0}, {1,0}, {1,1}, {0,1},
- {0,2}, {0,3}, {1,3}, {1,2},
- {2,2}, {2,3}, {3,3}, {3,2},
- {3,1}, {2,1}, {2,0}, {3,0}
-};
-
-#define MIN_DEQUANT_VAL 2
-
-typedef struct Vp3DecodeContext {
- AVCodecContext *avctx;
- int theora, theora_tables;
- int version;
- int width, height;
- int chroma_x_shift, chroma_y_shift;
- ThreadFrame golden_frame;
- ThreadFrame last_frame;
- ThreadFrame current_frame;
- int keyframe;
- uint8_t idct_permutation[64];
- uint8_t idct_scantable[64];
- HpelDSPContext hdsp;
- VideoDSPContext vdsp;
- VP3DSPContext vp3dsp;
- DECLARE_ALIGNED(16, int16_t, block)[64];
- int flipped_image;
- int last_slice_end;
- int skip_loop_filter;
-
- int qps[3];
- int nqps;
- int last_qps[3];
-
- int superblock_count;
- int y_superblock_width;
- int y_superblock_height;
- int y_superblock_count;
- int c_superblock_width;
- int c_superblock_height;
- int c_superblock_count;
- int u_superblock_start;
- int v_superblock_start;
- unsigned char *superblock_coding;
-
- int macroblock_count;
- int macroblock_width;
- int macroblock_height;
-
- int fragment_count;
- int fragment_width[2];
- int fragment_height[2];
-
- Vp3Fragment *all_fragments;
- int fragment_start[3];
- int data_offset[3];
-
- int8_t (*motion_val[2])[2];
-
- /* tables */
- uint16_t coded_dc_scale_factor[64];
- uint32_t coded_ac_scale_factor[64];
- uint8_t base_matrix[384][64];
- uint8_t qr_count[2][3];
- uint8_t qr_size [2][3][64];
- uint16_t qr_base[2][3][64];
-
- /**
- * This is a list of all tokens in bitstream order. Reordering takes place
- * by pulling from each level during IDCT. As a consequence, IDCT must be
- * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32
- * otherwise. The 32 different tokens with up to 12 bits of extradata are
- * collapsed into 3 types, packed as follows:
- * (from the low to high bits)
- *
- * 2 bits: type (0,1,2)
- * 0: EOB run, 14 bits for run length (12 needed)
- * 1: zero run, 7 bits for run length
- * 7 bits for the next coefficient (3 needed)
- * 2: coefficient, 14 bits (11 needed)
- *
- * Coefficients are signed, so are packed in the highest bits for automatic
- * sign extension.
- */
- int16_t *dct_tokens[3][64];
- int16_t *dct_tokens_base;
-#define TOKEN_EOB(eob_run) ((eob_run) << 2)
-#define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) << 9) + ((zero_run) << 2) + 1)
-#define TOKEN_COEFF(coeff) (((coeff) << 2) + 2)
-
- /**
- * number of blocks that contain DCT coefficients at the given level or higher
- */
- int num_coded_frags[3][64];
- int total_num_coded_frags;
-
- /* this is a list of indexes into the all_fragments array indicating
- * which of the fragments are coded */
- int *coded_fragment_list[3];
-
- VLC dc_vlc[16];
- VLC ac_vlc_1[16];
- VLC ac_vlc_2[16];
- VLC ac_vlc_3[16];
- VLC ac_vlc_4[16];
-
- VLC superblock_run_length_vlc;
- VLC fragment_run_length_vlc;
- VLC mode_code_vlc;
- VLC motion_vector_vlc;
-
- /* these arrays need to be on 16-byte boundaries since SSE2 operations
- * index into them */
- DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; ///< qmat[qpi][is_inter][plane]
-
- /* This table contains superblock_count * 16 entries. Each set of 16
- * numbers corresponds to the fragment indexes 0..15 of the superblock.
- * An entry will be -1 to indicate that no entry corresponds to that
- * index. */
- int *superblock_fragments;
-
- /* This is an array that indicates how a particular macroblock
- * is coded. */
- unsigned char *macroblock_coding;
-
- uint8_t *edge_emu_buffer;
-
- /* Huffman decode */
- int hti;
- unsigned int hbits;
- int entries;
- int huff_code_size;
- uint32_t huffman_table[80][32][2];
-
- uint8_t filter_limit_values[64];
- DECLARE_ALIGNED(8, int, bounding_values_array)[256+2];
-} Vp3DecodeContext;
-
-/************************************************************************
- * VP3 specific functions
- ************************************************************************/
-
-static void vp3_decode_flush(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
-
- if (s->golden_frame.f)
- ff_thread_release_buffer(avctx, &s->golden_frame);
- if (s->last_frame.f)
- ff_thread_release_buffer(avctx, &s->last_frame);
- if (s->current_frame.f)
- ff_thread_release_buffer(avctx, &s->current_frame);
-}
-
-static av_cold int vp3_decode_end(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- int i;
-
- av_freep(&s->superblock_coding);
- av_freep(&s->all_fragments);
- av_freep(&s->coded_fragment_list[0]);
- av_freep(&s->dct_tokens_base);
- av_freep(&s->superblock_fragments);
- av_freep(&s->macroblock_coding);
- av_freep(&s->motion_val[0]);
- av_freep(&s->motion_val[1]);
- av_freep(&s->edge_emu_buffer);
-
- s->theora_tables = 0;
-
- /* release all frames */
- vp3_decode_flush(avctx);
- av_frame_free(&s->current_frame.f);
- av_frame_free(&s->last_frame.f);
- av_frame_free(&s->golden_frame.f);
-
- if (avctx->internal->is_copy)
- return 0;
-
- for (i = 0; i < 16; i++) {
- ff_free_vlc(&s->dc_vlc[i]);
- ff_free_vlc(&s->ac_vlc_1[i]);
- ff_free_vlc(&s->ac_vlc_2[i]);
- ff_free_vlc(&s->ac_vlc_3[i]);
- ff_free_vlc(&s->ac_vlc_4[i]);
- }
-
- ff_free_vlc(&s->superblock_run_length_vlc);
- ff_free_vlc(&s->fragment_run_length_vlc);
- ff_free_vlc(&s->mode_code_vlc);
- ff_free_vlc(&s->motion_vector_vlc);
-
-
- return 0;
-}
-
-/**
- * This function sets up all of the various blocks mappings:
- * superblocks <-> fragments, macroblocks <-> fragments,
- * superblocks <-> macroblocks
- *
- * @return 0 is successful; returns 1 if *anything* went wrong.
- */
-static int init_block_mapping(Vp3DecodeContext *s)
-{
- int sb_x, sb_y, plane;
- int x, y, i, j = 0;
-
- for (plane = 0; plane < 3; plane++) {
- int sb_width = plane ? s->c_superblock_width : s->y_superblock_width;
- int sb_height = plane ? s->c_superblock_height : s->y_superblock_height;
- int frag_width = s->fragment_width[!!plane];
- int frag_height = s->fragment_height[!!plane];
-
- for (sb_y = 0; sb_y < sb_height; sb_y++)
- for (sb_x = 0; sb_x < sb_width; sb_x++)
- for (i = 0; i < 16; i++) {
- x = 4*sb_x + hilbert_offset[i][0];
- y = 4*sb_y + hilbert_offset[i][1];
-
- if (x < frag_width && y < frag_height)
- s->superblock_fragments[j++] = s->fragment_start[plane] + y*frag_width + x;
- else
- s->superblock_fragments[j++] = -1;
- }
- }
-
- return 0; /* successful path out */
-}
-
-/*
- * This function sets up the dequantization tables used for a particular
- * frame.
- */
-static void init_dequantizer(Vp3DecodeContext *s, int qpi)
-{
- int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]];
- int dc_scale_factor = s->coded_dc_scale_factor[s->qps[qpi]];
- int i, plane, inter, qri, bmi, bmj, qistart;
-
- for(inter=0; inter<2; inter++){
- for(plane=0; plane<3; plane++){
- int sum=0;
- for(qri=0; qri<s->qr_count[inter][plane]; qri++){
- sum+= s->qr_size[inter][plane][qri];
- if(s->qps[qpi] <= sum)
- break;
- }
- qistart= sum - s->qr_size[inter][plane][qri];
- bmi= s->qr_base[inter][plane][qri ];
- bmj= s->qr_base[inter][plane][qri+1];
- for(i=0; i<64; i++){
- int coeff= ( 2*(sum -s->qps[qpi])*s->base_matrix[bmi][i]
- - 2*(qistart-s->qps[qpi])*s->base_matrix[bmj][i]
- + s->qr_size[inter][plane][qri])
- / (2*s->qr_size[inter][plane][qri]);
-
- int qmin= 8<<(inter + !i);
- int qscale= i ? ac_scale_factor : dc_scale_factor;
-
- s->qmat[qpi][inter][plane][s->idct_permutation[i]] =
- av_clip((qscale * coeff) / 100 * 4, qmin, 4096);
- }
- // all DC coefficients use the same quant so as not to interfere with DC prediction
- s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0];
- }
- }
-}
-
-/*
- * This function initializes the loop filter boundary limits if the frame's
- * quality index is different from the previous frame's.
- *
- * The filter_limit_values may not be larger than 127.
- */
-static void init_loop_filter(Vp3DecodeContext *s)
-{
- int *bounding_values= s->bounding_values_array+127;
- int filter_limit;
- int x;
- int value;
-
- filter_limit = s->filter_limit_values[s->qps[0]];
- av_assert0(filter_limit < 128U);
-
- /* set up the bounding values */
- memset(s->bounding_values_array, 0, 256 * sizeof(int));
- for (x = 0; x < filter_limit; x++) {
- bounding_values[-x] = -x;
- bounding_values[x] = x;
- }
- for (x = value = filter_limit; x < 128 && value; x++, value--) {
- bounding_values[ x] = value;
- bounding_values[-x] = -value;
- }
- if (value)
- bounding_values[128] = value;
- bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
-}
-
-/*
- * This function unpacks all of the superblock/macroblock/fragment coding
- * information from the bitstream.
- */
-static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int superblock_starts[3] = { 0, s->u_superblock_start, s->v_superblock_start };
- int bit = 0;
- int current_superblock = 0;
- int current_run = 0;
- int num_partial_superblocks = 0;
-
- int i, j;
- int current_fragment;
- int plane;
-
- if (s->keyframe) {
- memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count);
-
- } else {
-
- /* unpack the list of partially-coded superblocks */
- bit = get_bits1(gb) ^ 1;
- current_run = 0;
-
- while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) {
- if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
- bit = get_bits1(gb);
- else
- bit ^= 1;
-
- current_run = get_vlc2(gb,
- s->superblock_run_length_vlc.table, 6, 2) + 1;
- if (current_run == 34)
- current_run += get_bits(gb, 12);
-
- if (current_superblock + current_run > s->superblock_count) {
- av_log(s->avctx, AV_LOG_ERROR, "Invalid partially coded superblock run length\n");
- return -1;
- }
-
- memset(s->superblock_coding + current_superblock, bit, current_run);
-
- current_superblock += current_run;
- if (bit)
- num_partial_superblocks += current_run;
- }
-
- /* unpack the list of fully coded superblocks if any of the blocks were
- * not marked as partially coded in the previous step */
- if (num_partial_superblocks < s->superblock_count) {
- int superblocks_decoded = 0;
-
- current_superblock = 0;
- bit = get_bits1(gb) ^ 1;
- current_run = 0;
-
- while (superblocks_decoded < s->superblock_count - num_partial_superblocks
- && get_bits_left(gb) > 0) {
-
- if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN)
- bit = get_bits1(gb);
- else
- bit ^= 1;
-
- current_run = get_vlc2(gb,
- s->superblock_run_length_vlc.table, 6, 2) + 1;
- if (current_run == 34)
- current_run += get_bits(gb, 12);
-
- for (j = 0; j < current_run; current_superblock++) {
- if (current_superblock >= s->superblock_count) {
- av_log(s->avctx, AV_LOG_ERROR, "Invalid fully coded superblock run length\n");
- return -1;
- }
-
- /* skip any superblocks already marked as partially coded */
- if (s->superblock_coding[current_superblock] == SB_NOT_CODED) {
- s->superblock_coding[current_superblock] = 2*bit;
- j++;
- }
- }
- superblocks_decoded += current_run;
- }
- }
-
- /* if there were partial blocks, initialize bitstream for
- * unpacking fragment codings */
- if (num_partial_superblocks) {
-
- current_run = 0;
- bit = get_bits1(gb);
- /* toggle the bit because as soon as the first run length is
- * fetched the bit will be toggled again */
- bit ^= 1;
- }
- }
-
- /* figure out which fragments are coded; iterate through each
- * superblock (all planes) */
- s->total_num_coded_frags = 0;
- memset(s->macroblock_coding, MODE_COPY, s->macroblock_count);
-
- for (plane = 0; plane < 3; plane++) {
- int sb_start = superblock_starts[plane];
- int sb_end = sb_start + (plane ? s->c_superblock_count : s->y_superblock_count);
- int num_coded_frags = 0;
-
- for (i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) {
-
- /* iterate through all 16 fragments in a superblock */
- for (j = 0; j < 16; j++) {
-
- /* if the fragment is in bounds, check its coding status */
- current_fragment = s->superblock_fragments[i * 16 + j];
- if (current_fragment != -1) {
- int coded = s->superblock_coding[i];
-
- if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
-
- /* fragment may or may not be coded; this is the case
- * that cares about the fragment coding runs */
- if (current_run-- == 0) {
- bit ^= 1;
- current_run = get_vlc2(gb,
- s->fragment_run_length_vlc.table, 5, 2);
- }
- coded = bit;
- }
-
- if (coded) {
- /* default mode; actual mode will be decoded in
- * the next phase */
- s->all_fragments[current_fragment].coding_method =
- MODE_INTER_NO_MV;
- s->coded_fragment_list[plane][num_coded_frags++] =
- current_fragment;
- } else {
- /* not coded; copy this fragment from the prior frame */
- s->all_fragments[current_fragment].coding_method =
- MODE_COPY;
- }
- }
- }
- }
- s->total_num_coded_frags += num_coded_frags;
- for (i = 0; i < 64; i++)
- s->num_coded_frags[plane][i] = num_coded_frags;
- if (plane < 2)
- s->coded_fragment_list[plane+1] = s->coded_fragment_list[plane] + num_coded_frags;
- }
- return 0;
-}
-
-/*
- * This function unpacks all the coding mode data for individual macroblocks
- * from the bitstream.
- */
-static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int i, j, k, sb_x, sb_y;
- int scheme;
- int current_macroblock;
- int current_fragment;
- int coding_mode;
- int custom_mode_alphabet[CODING_MODE_COUNT];
- const int *alphabet;
- Vp3Fragment *frag;
-
- if (s->keyframe) {
- for (i = 0; i < s->fragment_count; i++)
- s->all_fragments[i].coding_method = MODE_INTRA;
-
- } else {
-
- /* fetch the mode coding scheme for this frame */
- scheme = get_bits(gb, 3);
-
- /* is it a custom coding scheme? */
- if (scheme == 0) {
- for (i = 0; i < 8; i++)
- custom_mode_alphabet[i] = MODE_INTER_NO_MV;
- for (i = 0; i < 8; i++)
- custom_mode_alphabet[get_bits(gb, 3)] = i;
- alphabet = custom_mode_alphabet;
- } else
- alphabet = ModeAlphabet[scheme-1];
-
- /* iterate through all of the macroblocks that contain 1 or more
- * coded fragments */
- for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
- for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
- if (get_bits_left(gb) <= 0)
- return -1;
-
- for (j = 0; j < 4; j++) {
- int mb_x = 2*sb_x + (j>>1);
- int mb_y = 2*sb_y + (((j>>1)+j)&1);
- current_macroblock = mb_y * s->macroblock_width + mb_x;
-
- if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height)
- continue;
-
-#define BLOCK_X (2*mb_x + (k&1))
-#define BLOCK_Y (2*mb_y + (k>>1))
- /* coding modes are only stored if the macroblock has at least one
- * luma block coded, otherwise it must be INTER_NO_MV */
- for (k = 0; k < 4; k++) {
- current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
- if (s->all_fragments[current_fragment].coding_method != MODE_COPY)
- break;
- }
- if (k == 4) {
- s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV;
- continue;
- }
-
- /* mode 7 means get 3 bits for each coding mode */
- if (scheme == 7)
- coding_mode = get_bits(gb, 3);
- else
- coding_mode = alphabet
- [get_vlc2(gb, s->mode_code_vlc.table, 3, 3)];
-
- s->macroblock_coding[current_macroblock] = coding_mode;
- for (k = 0; k < 4; k++) {
- frag = s->all_fragments + BLOCK_Y*s->fragment_width[0] + BLOCK_X;
- if (frag->coding_method != MODE_COPY)
- frag->coding_method = coding_mode;
- }
-
-#define SET_CHROMA_MODES \
- if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \
- frag[s->fragment_start[1]].coding_method = coding_mode;\
- if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \
- frag[s->fragment_start[2]].coding_method = coding_mode;
-
- if (s->chroma_y_shift) {
- frag = s->all_fragments + mb_y*s->fragment_width[1] + mb_x;
- SET_CHROMA_MODES
- } else if (s->chroma_x_shift) {
- frag = s->all_fragments + 2*mb_y*s->fragment_width[1] + mb_x;
- for (k = 0; k < 2; k++) {
- SET_CHROMA_MODES
- frag += s->fragment_width[1];
- }
- } else {
- for (k = 0; k < 4; k++) {
- frag = s->all_fragments + BLOCK_Y*s->fragment_width[1] + BLOCK_X;
- SET_CHROMA_MODES
- }
- }
- }
- }
- }
- }
-
- return 0;
-}
-
-/*
- * This function unpacks all the motion vectors for the individual
- * macroblocks from the bitstream.
- */
-static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int j, k, sb_x, sb_y;
- int coding_mode;
- int motion_x[4];
- int motion_y[4];
- int last_motion_x = 0;
- int last_motion_y = 0;
- int prior_last_motion_x = 0;
- int prior_last_motion_y = 0;
- int current_macroblock;
- int current_fragment;
- int frag;
-
- if (s->keyframe)
- return 0;
-
- /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */
- coding_mode = get_bits1(gb);
-
- /* iterate through all of the macroblocks that contain 1 or more
- * coded fragments */
- for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) {
- for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) {
- if (get_bits_left(gb) <= 0)
- return -1;
-
- for (j = 0; j < 4; j++) {
- int mb_x = 2*sb_x + (j>>1);
- int mb_y = 2*sb_y + (((j>>1)+j)&1);
- current_macroblock = mb_y * s->macroblock_width + mb_x;
-
- if (mb_x >= s->macroblock_width || mb_y >= s->macroblock_height ||
- (s->macroblock_coding[current_macroblock] == MODE_COPY))
- continue;
-
- switch (s->macroblock_coding[current_macroblock]) {
-
- case MODE_INTER_PLUS_MV:
- case MODE_GOLDEN_MV:
- /* all 6 fragments use the same motion vector */
- if (coding_mode == 0) {
- motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- } else {
- motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
- motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
- }
-
- /* vector maintenance, only on MODE_INTER_PLUS_MV */
- if (s->macroblock_coding[current_macroblock] ==
- MODE_INTER_PLUS_MV) {
- prior_last_motion_x = last_motion_x;
- prior_last_motion_y = last_motion_y;
- last_motion_x = motion_x[0];
- last_motion_y = motion_y[0];
- }
- break;
-
- case MODE_INTER_FOURMV:
- /* vector maintenance */
- prior_last_motion_x = last_motion_x;
- prior_last_motion_y = last_motion_y;
-
- /* fetch 4 vectors from the bitstream, one for each
- * Y fragment, then average for the C fragment vectors */
- for (k = 0; k < 4; k++) {
- current_fragment = BLOCK_Y*s->fragment_width[0] + BLOCK_X;
- if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
- if (coding_mode == 0) {
- motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- } else {
- motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
- motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
- }
- last_motion_x = motion_x[k];
- last_motion_y = motion_y[k];
- } else {
- motion_x[k] = 0;
- motion_y[k] = 0;
- }
- }
- break;
-
- case MODE_INTER_LAST_MV:
- /* all 6 fragments use the last motion vector */
- motion_x[0] = last_motion_x;
- motion_y[0] = last_motion_y;
-
- /* no vector maintenance (last vector remains the
- * last vector) */
- break;
-
- case MODE_INTER_PRIOR_LAST:
- /* all 6 fragments use the motion vector prior to the
- * last motion vector */
- motion_x[0] = prior_last_motion_x;
- motion_y[0] = prior_last_motion_y;
-
- /* vector maintenance */
- prior_last_motion_x = last_motion_x;
- prior_last_motion_y = last_motion_y;
- last_motion_x = motion_x[0];
- last_motion_y = motion_y[0];
- break;
-
- default:
- /* covers intra, inter without MV, golden without MV */
- motion_x[0] = 0;
- motion_y[0] = 0;
-
- /* no vector maintenance */
- break;
- }
-
- /* assign the motion vectors to the correct fragments */
- for (k = 0; k < 4; k++) {
- current_fragment =
- BLOCK_Y*s->fragment_width[0] + BLOCK_X;
- if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
- s->motion_val[0][current_fragment][0] = motion_x[k];
- s->motion_val[0][current_fragment][1] = motion_y[k];
- } else {
- s->motion_val[0][current_fragment][0] = motion_x[0];
- s->motion_val[0][current_fragment][1] = motion_y[0];
- }
- }
-
- if (s->chroma_y_shift) {
- if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
- motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] + motion_x[2] + motion_x[3], 2);
- motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] + motion_y[2] + motion_y[3], 2);
- }
- motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
- motion_y[0] = (motion_y[0]>>1) | (motion_y[0]&1);
- frag = mb_y*s->fragment_width[1] + mb_x;
- s->motion_val[1][frag][0] = motion_x[0];
- s->motion_val[1][frag][1] = motion_y[0];
- } else if (s->chroma_x_shift) {
- if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
- motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1);
- motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1);
- motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1);
- motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1);
- } else {
- motion_x[1] = motion_x[0];
- motion_y[1] = motion_y[0];
- }
- motion_x[0] = (motion_x[0]>>1) | (motion_x[0]&1);
- motion_x[1] = (motion_x[1]>>1) | (motion_x[1]&1);
-
- frag = 2*mb_y*s->fragment_width[1] + mb_x;
- for (k = 0; k < 2; k++) {
- s->motion_val[1][frag][0] = motion_x[k];
- s->motion_val[1][frag][1] = motion_y[k];
- frag += s->fragment_width[1];
- }
- } else {
- for (k = 0; k < 4; k++) {
- frag = BLOCK_Y*s->fragment_width[1] + BLOCK_X;
- if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) {
- s->motion_val[1][frag][0] = motion_x[k];
- s->motion_val[1][frag][1] = motion_y[k];
- } else {
- s->motion_val[1][frag][0] = motion_x[0];
- s->motion_val[1][frag][1] = motion_y[0];
- }
- }
- }
- }
- }
- }
-
- return 0;
-}
-
-static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi;
- int num_blocks = s->total_num_coded_frags;
-
- for (qpi = 0; qpi < s->nqps-1 && num_blocks > 0; qpi++) {
- i = blocks_decoded = num_blocks_at_qpi = 0;
-
- bit = get_bits1(gb) ^ 1;
- run_length = 0;
-
- do {
- if (run_length == MAXIMUM_LONG_BIT_RUN)
- bit = get_bits1(gb);
- else
- bit ^= 1;
-
- run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
- if (run_length == 34)
- run_length += get_bits(gb, 12);
- blocks_decoded += run_length;
-
- if (!bit)
- num_blocks_at_qpi += run_length;
-
- for (j = 0; j < run_length; i++) {
- if (i >= s->total_num_coded_frags)
- return -1;
-
- if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) {
- s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit;
- j++;
- }
- }
- } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0);
-
- num_blocks -= num_blocks_at_qpi;
- }
-
- return 0;
-}
-
-/*
- * This function is called by unpack_dct_coeffs() to extract the VLCs from
- * the bitstream. The VLCs encode tokens which are used to unpack DCT
- * data. This function unpacks all the VLCs for either the Y plane or both
- * C planes, and is called for DC coefficients or different AC coefficient
- * levels (since different coefficient types require different VLC tables.
- *
- * This function returns a residual eob run. E.g, if a particular token gave
- * instructions to EOB the next 5 fragments and there were only 2 fragments
- * left in the current fragment range, 3 would be returned so that it could
- * be passed into the next call to this same function.
- */
-static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
- VLC *table, int coeff_index,
- int plane,
- int eob_run)
-{
- int i, j = 0;
- int token;
- int zero_run = 0;
- int16_t coeff = 0;
- int bits_to_get;
- int blocks_ended;
- int coeff_i = 0;
- int num_coeffs = s->num_coded_frags[plane][coeff_index];
- int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
-
- /* local references to structure members to avoid repeated deferences */
- int *coded_fragment_list = s->coded_fragment_list[plane];
- Vp3Fragment *all_fragments = s->all_fragments;
- VLC_TYPE (*vlc_table)[2] = table->table;
-
- if (num_coeffs < 0)
- av_log(s->avctx, AV_LOG_ERROR, "Invalid number of coefficents at level %d\n", coeff_index);
-
- if (eob_run > num_coeffs) {
- coeff_i = blocks_ended = num_coeffs;
- eob_run -= num_coeffs;
- } else {
- coeff_i = blocks_ended = eob_run;
- eob_run = 0;
- }
-
- // insert fake EOB token to cover the split between planes or zzi
- if (blocks_ended)
- dct_tokens[j++] = blocks_ended << 2;
-
- while (coeff_i < num_coeffs && get_bits_left(gb) > 0) {
- /* decode a VLC into a token */
- token = get_vlc2(gb, vlc_table, 11, 3);
- /* use the token to get a zero run, a coefficient, and an eob run */
- if ((unsigned) token <= 6U) {
- eob_run = eob_run_base[token];
- if (eob_run_get_bits[token])
- eob_run += get_bits(gb, eob_run_get_bits[token]);
-
- // record only the number of blocks ended in this plane,
- // any spill will be recorded in the next plane.
- if (eob_run > num_coeffs - coeff_i) {
- dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i);
- blocks_ended += num_coeffs - coeff_i;
- eob_run -= num_coeffs - coeff_i;
- coeff_i = num_coeffs;
- } else {
- dct_tokens[j++] = TOKEN_EOB(eob_run);
- blocks_ended += eob_run;
- coeff_i += eob_run;
- eob_run = 0;
- }
- } else if (token >= 0) {
- bits_to_get = coeff_get_bits[token];
- if (bits_to_get)
- bits_to_get = get_bits(gb, bits_to_get);
- coeff = coeff_tables[token][bits_to_get];
-
- zero_run = zero_run_base[token];
- if (zero_run_get_bits[token])
- zero_run += get_bits(gb, zero_run_get_bits[token]);
-
- if (zero_run) {
- dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run);
- } else {
- // Save DC into the fragment structure. DC prediction is
- // done in raster order, so the actual DC can't be in with
- // other tokens. We still need the token in dct_tokens[]
- // however, or else the structure collapses on itself.
- if (!coeff_index)
- all_fragments[coded_fragment_list[coeff_i]].dc = coeff;
-
- dct_tokens[j++] = TOKEN_COEFF(coeff);
- }
-
- if (coeff_index + zero_run > 64) {
- av_log(s->avctx, AV_LOG_DEBUG, "Invalid zero run of %d with"
- " %d coeffs left\n", zero_run, 64-coeff_index);
- zero_run = 64 - coeff_index;
- }
-
- // zero runs code multiple coefficients,
- // so don't try to decode coeffs for those higher levels
- for (i = coeff_index+1; i <= coeff_index+zero_run; i++)
- s->num_coded_frags[plane][i]--;
- coeff_i++;
- } else {
- av_log(s->avctx, AV_LOG_ERROR,
- "Invalid token %d\n", token);
- return -1;
- }
- }
-
- if (blocks_ended > s->num_coded_frags[plane][coeff_index])
- av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
-
- // decrement the number of blocks that have higher coeffecients for each
- // EOB run at this level
- if (blocks_ended)
- for (i = coeff_index+1; i < 64; i++)
- s->num_coded_frags[plane][i] -= blocks_ended;
-
- // setup the next buffer
- if (plane < 2)
- s->dct_tokens[plane+1][coeff_index] = dct_tokens + j;
- else if (coeff_index < 63)
- s->dct_tokens[0][coeff_index+1] = dct_tokens + j;
-
- return eob_run;
-}
-
-static void reverse_dc_prediction(Vp3DecodeContext *s,
- int first_fragment,
- int fragment_width,
- int fragment_height);
-/*
- * This function unpacks all of the DCT coefficient data from the
- * bitstream.
- */
-static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
-{
- int i;
- int dc_y_table;
- int dc_c_table;
- int ac_y_table;
- int ac_c_table;
- int residual_eob_run = 0;
- VLC *y_tables[64];
- VLC *c_tables[64];
-
- s->dct_tokens[0][0] = s->dct_tokens_base;
-
- /* fetch the DC table indexes */
- dc_y_table = get_bits(gb, 4);
- dc_c_table = get_bits(gb, 4);
-
- /* unpack the Y plane DC coefficients */
- residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0,
- 0, residual_eob_run);
- if (residual_eob_run < 0)
- return residual_eob_run;
-
- /* reverse prediction of the Y-plane DC coefficients */
- reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
-
- /* unpack the C plane DC coefficients */
- residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
- 1, residual_eob_run);
- if (residual_eob_run < 0)
- return residual_eob_run;
- residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0,
- 2, residual_eob_run);
- if (residual_eob_run < 0)
- return residual_eob_run;
-
- /* reverse prediction of the C-plane DC coefficients */
- if (!(s->avctx->flags & CODEC_FLAG_GRAY))
- {
- reverse_dc_prediction(s, s->fragment_start[1],
- s->fragment_width[1], s->fragment_height[1]);
- reverse_dc_prediction(s, s->fragment_start[2],
- s->fragment_width[1], s->fragment_height[1]);
- }
-
- /* fetch the AC table indexes */
- ac_y_table = get_bits(gb, 4);
- ac_c_table = get_bits(gb, 4);
-
- /* build tables of AC VLC tables */
- for (i = 1; i <= 5; i++) {
- y_tables[i] = &s->ac_vlc_1[ac_y_table];
- c_tables[i] = &s->ac_vlc_1[ac_c_table];
- }
- for (i = 6; i <= 14; i++) {
- y_tables[i] = &s->ac_vlc_2[ac_y_table];
- c_tables[i] = &s->ac_vlc_2[ac_c_table];
- }
- for (i = 15; i <= 27; i++) {
- y_tables[i] = &s->ac_vlc_3[ac_y_table];
- c_tables[i] = &s->ac_vlc_3[ac_c_table];
- }
- for (i = 28; i <= 63; i++) {
- y_tables[i] = &s->ac_vlc_4[ac_y_table];
- c_tables[i] = &s->ac_vlc_4[ac_c_table];
- }
-
- /* decode all AC coefficents */
- for (i = 1; i <= 63; i++) {
- residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
- 0, residual_eob_run);
- if (residual_eob_run < 0)
- return residual_eob_run;
-
- residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
- 1, residual_eob_run);
- if (residual_eob_run < 0)
- return residual_eob_run;
- residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i,
- 2, residual_eob_run);
- if (residual_eob_run < 0)
- return residual_eob_run;
- }
-
- return 0;
-}
-
-/*
- * This function reverses the DC prediction for each coded fragment in
- * the frame. Much of this function is adapted directly from the original
- * VP3 source code.
- */
-#define COMPATIBLE_FRAME(x) \
- (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type)
-#define DC_COEFF(u) s->all_fragments[u].dc
-
-static void reverse_dc_prediction(Vp3DecodeContext *s,
- int first_fragment,
- int fragment_width,
- int fragment_height)
-{
-
-#define PUL 8
-#define PU 4
-#define PUR 2
-#define PL 1
-
- int x, y;
- int i = first_fragment;
-
- int predicted_dc;
-
- /* DC values for the left, up-left, up, and up-right fragments */
- int vl, vul, vu, vur;
-
- /* indexes for the left, up-left, up, and up-right fragments */
- int l, ul, u, ur;
-
- /*
- * The 6 fields mean:
- * 0: up-left multiplier
- * 1: up multiplier
- * 2: up-right multiplier
- * 3: left multiplier
- */
- static const int predictor_transform[16][4] = {
- { 0, 0, 0, 0},
- { 0, 0, 0,128}, // PL
- { 0, 0,128, 0}, // PUR
- { 0, 0, 53, 75}, // PUR|PL
- { 0,128, 0, 0}, // PU
- { 0, 64, 0, 64}, // PU|PL
- { 0,128, 0, 0}, // PU|PUR
- { 0, 0, 53, 75}, // PU|PUR|PL
- {128, 0, 0, 0}, // PUL
- { 0, 0, 0,128}, // PUL|PL
- { 64, 0, 64, 0}, // PUL|PUR
- { 0, 0, 53, 75}, // PUL|PUR|PL
- { 0,128, 0, 0}, // PUL|PU
- {-104,116, 0,116}, // PUL|PU|PL
- { 24, 80, 24, 0}, // PUL|PU|PUR
- {-104,116, 0,116} // PUL|PU|PUR|PL
- };
-
- /* This table shows which types of blocks can use other blocks for
- * prediction. For example, INTRA is the only mode in this table to
- * have a frame number of 0. That means INTRA blocks can only predict
- * from other INTRA blocks. There are 2 golden frame coding types;
- * blocks encoding in these modes can only predict from other blocks
- * that were encoded with these 1 of these 2 modes. */
- static const unsigned char compatible_frame[9] = {
- 1, /* MODE_INTER_NO_MV */
- 0, /* MODE_INTRA */
- 1, /* MODE_INTER_PLUS_MV */
- 1, /* MODE_INTER_LAST_MV */
- 1, /* MODE_INTER_PRIOR_MV */
- 2, /* MODE_USING_GOLDEN */
- 2, /* MODE_GOLDEN_MV */
- 1, /* MODE_INTER_FOUR_MV */
- 3 /* MODE_COPY */
- };
- int current_frame_type;
-
- /* there is a last DC predictor for each of the 3 frame types */
- short last_dc[3];
-
- int transform = 0;
-
- vul = vu = vur = vl = 0;
- last_dc[0] = last_dc[1] = last_dc[2] = 0;
-
- /* for each fragment row... */
- for (y = 0; y < fragment_height; y++) {
-
- /* for each fragment in a row... */
- for (x = 0; x < fragment_width; x++, i++) {
-
- /* reverse prediction if this block was coded */
- if (s->all_fragments[i].coding_method != MODE_COPY) {
-
- current_frame_type =
- compatible_frame[s->all_fragments[i].coding_method];
-
- transform= 0;
- if(x){
- l= i-1;
- vl = DC_COEFF(l);
- if(COMPATIBLE_FRAME(l))
- transform |= PL;
- }
- if(y){
- u= i-fragment_width;
- vu = DC_COEFF(u);
- if(COMPATIBLE_FRAME(u))
- transform |= PU;
- if(x){
- ul= i-fragment_width-1;
- vul = DC_COEFF(ul);
- if(COMPATIBLE_FRAME(ul))
- transform |= PUL;
- }
- if(x + 1 < fragment_width){
- ur= i-fragment_width+1;
- vur = DC_COEFF(ur);
- if(COMPATIBLE_FRAME(ur))
- transform |= PUR;
- }
- }
-
- if (transform == 0) {
-
- /* if there were no fragments to predict from, use last
- * DC saved */
- predicted_dc = last_dc[current_frame_type];
- } else {
-
- /* apply the appropriate predictor transform */
- predicted_dc =
- (predictor_transform[transform][0] * vul) +
- (predictor_transform[transform][1] * vu) +
- (predictor_transform[transform][2] * vur) +
- (predictor_transform[transform][3] * vl);
-
- predicted_dc /= 128;
-
- /* check for outranging on the [ul u l] and
- * [ul u ur l] predictors */
- if ((transform == 15) || (transform == 13)) {
- if (FFABS(predicted_dc - vu) > 128)
- predicted_dc = vu;
- else if (FFABS(predicted_dc - vl) > 128)
- predicted_dc = vl;
- else if (FFABS(predicted_dc - vul) > 128)
- predicted_dc = vul;
- }
- }
-
- /* at long last, apply the predictor */
- DC_COEFF(i) += predicted_dc;
- /* save the DC */
- last_dc[current_frame_type] = DC_COEFF(i);
- }
- }
- }
-}
-
-static void apply_loop_filter(Vp3DecodeContext *s, int plane, int ystart, int yend)
-{
- int x, y;
- int *bounding_values= s->bounding_values_array+127;
-
- int width = s->fragment_width[!!plane];
- int height = s->fragment_height[!!plane];
- int fragment = s->fragment_start [plane] + ystart * width;
- ptrdiff_t stride = s->current_frame.f->linesize[plane];
- uint8_t *plane_data = s->current_frame.f->data [plane];
- if (!s->flipped_image) stride = -stride;
- plane_data += s->data_offset[plane] + 8*ystart*stride;
-
- for (y = ystart; y < yend; y++) {
-
- for (x = 0; x < width; x++) {
- /* This code basically just deblocks on the edges of coded blocks.
- * However, it has to be much more complicated because of the
- * braindamaged deblock ordering used in VP3/Theora. Order matters
- * because some pixels get filtered twice. */
- if( s->all_fragments[fragment].coding_method != MODE_COPY )
- {
- /* do not perform left edge filter for left columns frags */
- if (x > 0) {
- s->vp3dsp.h_loop_filter(
- plane_data + 8*x,
- stride, bounding_values);
- }
-
- /* do not perform top edge filter for top row fragments */
- if (y > 0) {
- s->vp3dsp.v_loop_filter(
- plane_data + 8*x,
- stride, bounding_values);
- }
-
- /* do not perform right edge filter for right column
- * fragments or if right fragment neighbor is also coded
- * in this frame (it will be filtered in next iteration) */
- if ((x < width - 1) &&
- (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) {
- s->vp3dsp.h_loop_filter(
- plane_data + 8*x + 8,
- stride, bounding_values);
- }
-
- /* do not perform bottom edge filter for bottom row
- * fragments or if bottom fragment neighbor is also coded
- * in this frame (it will be filtered in the next row) */
- if ((y < height - 1) &&
- (s->all_fragments[fragment + width].coding_method == MODE_COPY)) {
- s->vp3dsp.v_loop_filter(
- plane_data + 8*x + 8*stride,
- stride, bounding_values);
- }
- }
-
- fragment++;
- }
- plane_data += 8*stride;
- }
-}
-
-/**
- * Pull DCT tokens from the 64 levels to decode and dequant the coefficients
- * for the next block in coding order
- */
-static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
- int plane, int inter, int16_t block[64])
-{
- int16_t *dequantizer = s->qmat[frag->qpi][inter][plane];
- uint8_t *perm = s->idct_scantable;
- int i = 0;
-
- do {
- int token = *s->dct_tokens[plane][i];
- switch (token & 3) {
- case 0: // EOB
- if (--token < 4) // 0-3 are token types, so the EOB run must now be 0
- s->dct_tokens[plane][i]++;
- else
- *s->dct_tokens[plane][i] = token & ~3;
- goto end;
- case 1: // zero run
- s->dct_tokens[plane][i]++;
- i += (token >> 2) & 0x7f;
- if (i > 63) {
- av_log(s->avctx, AV_LOG_ERROR, "Coefficient index overflow\n");
- return i;
- }
- block[perm[i]] = (token >> 9) * dequantizer[perm[i]];
- i++;
- break;
- case 2: // coeff
- block[perm[i]] = (token >> 2) * dequantizer[perm[i]];
- s->dct_tokens[plane][i++]++;
- break;
- default: // shouldn't happen
- return i;
- }
- } while (i < 64);
- // return value is expected to be a valid level
- i--;
-end:
- // the actual DC+prediction is in the fragment structure
- block[0] = frag->dc * s->qmat[0][inter][plane][0];
- return i;
-}
-
-/**
- * called when all pixels up to row y are complete
- */
-static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
-{
- int h, cy, i;
- int offset[AV_NUM_DATA_POINTERS];
-
- if (HAVE_THREADS && s->avctx->active_thread_type&FF_THREAD_FRAME) {
- int y_flipped = s->flipped_image ? s->avctx->height-y : y;
-
- // At the end of the frame, report INT_MAX instead of the height of the frame.
- // This makes the other threads' ff_thread_await_progress() calls cheaper, because
- // they don't have to clip their values.
- ff_thread_report_progress(&s->current_frame, y_flipped==s->avctx->height ? INT_MAX : y_flipped-1, 0);
- }
-
- if(s->avctx->draw_horiz_band==NULL)
- return;
-
- h= y - s->last_slice_end;
- s->last_slice_end= y;
- y -= h;
-
- if (!s->flipped_image) {
- y = s->avctx->height - y - h;
- }
-
- cy = y >> s->chroma_y_shift;
- offset[0] = s->current_frame.f->linesize[0]*y;
- offset[1] = s->current_frame.f->linesize[1]*cy;
- offset[2] = s->current_frame.f->linesize[2]*cy;
- for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
- offset[i] = 0;
-
- emms_c();
- s->avctx->draw_horiz_band(s->avctx, s->current_frame.f, offset, y, 3, h);
-}
-
-/**
- * Wait for the reference frame of the current fragment.
- * The progress value is in luma pixel rows.
- */
-static void await_reference_row(Vp3DecodeContext *s, Vp3Fragment *fragment, int motion_y, int y)
-{
- ThreadFrame *ref_frame;
- int ref_row;
- int border = motion_y&1;
-
- if (fragment->coding_method == MODE_USING_GOLDEN ||
- fragment->coding_method == MODE_GOLDEN_MV)
- ref_frame = &s->golden_frame;
- else
- ref_frame = &s->last_frame;
-
- ref_row = y + (motion_y>>1);
- ref_row = FFMAX(FFABS(ref_row), ref_row + 8 + border);
-
- ff_thread_await_progress(ref_frame, ref_row, 0);
-}
-
-/*
- * Perform the final rendering for a particular slice of data.
- * The slice number ranges from 0..(c_superblock_height - 1).
- */
-static void render_slice(Vp3DecodeContext *s, int slice)
-{
- int x, y, i, j, fragment;
- int16_t *block = s->block;
- int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
- int motion_halfpel_index;
- uint8_t *motion_source;
- int plane, first_pixel;
-
- if (slice >= s->c_superblock_height)
- return;
-
- for (plane = 0; plane < 3; plane++) {
- uint8_t *output_plane = s->current_frame.f->data [plane] + s->data_offset[plane];
- uint8_t * last_plane = s-> last_frame.f->data [plane] + s->data_offset[plane];
- uint8_t *golden_plane = s-> golden_frame.f->data [plane] + s->data_offset[plane];
- ptrdiff_t stride = s->current_frame.f->linesize[plane];
- int plane_width = s->width >> (plane && s->chroma_x_shift);
- int plane_height = s->height >> (plane && s->chroma_y_shift);
- int8_t (*motion_val)[2] = s->motion_val[!!plane];
-
- int sb_x, sb_y = slice << (!plane && s->chroma_y_shift);
- int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift);
- int slice_width = plane ? s->c_superblock_width : s->y_superblock_width;
-
- int fragment_width = s->fragment_width[!!plane];
- int fragment_height = s->fragment_height[!!plane];
- int fragment_start = s->fragment_start[plane];
- int do_await = !plane && HAVE_THREADS && (s->avctx->active_thread_type&FF_THREAD_FRAME);
-
- if (!s->flipped_image) stride = -stride;
- if (CONFIG_GRAY && plane && (s->avctx->flags & CODEC_FLAG_GRAY))
- continue;
-
- /* for each superblock row in the slice (both of them)... */
- for (; sb_y < slice_height; sb_y++) {
-
- /* for each superblock in a row... */
- for (sb_x = 0; sb_x < slice_width; sb_x++) {
-
- /* for each block in a superblock... */
- for (j = 0; j < 16; j++) {
- x = 4*sb_x + hilbert_offset[j][0];
- y = 4*sb_y + hilbert_offset[j][1];
- fragment = y*fragment_width + x;
-
- i = fragment_start + fragment;
-
- // bounds check
- if (x >= fragment_width || y >= fragment_height)
- continue;
-
- first_pixel = 8*y*stride + 8*x;
-
- if (do_await && s->all_fragments[i].coding_method != MODE_INTRA)
- await_reference_row(s, &s->all_fragments[i], motion_val[fragment][1], (16*y) >> s->chroma_y_shift);
-
- /* transform if this block was coded */
- if (s->all_fragments[i].coding_method != MODE_COPY) {
- if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
- (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
- motion_source= golden_plane;
- else
- motion_source= last_plane;
-
- motion_source += first_pixel;
- motion_halfpel_index = 0;
-
- /* sort out the motion vector if this fragment is coded
- * using a motion vector method */
- if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
- (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
- int src_x, src_y;
- motion_x = motion_val[fragment][0];
- motion_y = motion_val[fragment][1];
-
- src_x= (motion_x>>1) + 8*x;
- src_y= (motion_y>>1) + 8*y;
-
- motion_halfpel_index = motion_x & 0x01;
- motion_source += (motion_x >> 1);
-
- motion_halfpel_index |= (motion_y & 0x01) << 1;
- motion_source += ((motion_y >> 1) * stride);
-
- if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
- uint8_t *temp= s->edge_emu_buffer;
- if(stride<0) temp -= 8*stride;
-
- s->vdsp.emulated_edge_mc(temp, motion_source,
- stride, stride,
- 9, 9, src_x, src_y,
- plane_width,
- plane_height);
- motion_source= temp;
- }
- }
-
-
- /* first, take care of copying a block from either the
- * previous or the golden frame */
- if (s->all_fragments[i].coding_method != MODE_INTRA) {
- /* Note, it is possible to implement all MC cases with
- put_no_rnd_pixels_l2 which would look more like the
- VP3 source but this would be slower as
- put_no_rnd_pixels_tab is better optimzed */
- if(motion_halfpel_index != 3){
- s->hdsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
- output_plane + first_pixel,
- motion_source, stride, 8);
- }else{
- int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
- s->vp3dsp.put_no_rnd_pixels_l2(
- output_plane + first_pixel,
- motion_source - d,
- motion_source + stride + 1 + d,
- stride, 8);
- }
- }
-
- /* invert DCT and place (or add) in final output */
-
- if (s->all_fragments[i].coding_method == MODE_INTRA) {
- vp3_dequant(s, s->all_fragments + i, plane, 0, block);
- s->vp3dsp.idct_put(
- output_plane + first_pixel,
- stride,
- block);
- } else {
- if (vp3_dequant(s, s->all_fragments + i, plane, 1, block)) {
- s->vp3dsp.idct_add(
- output_plane + first_pixel,
- stride,
- block);
- } else {
- s->vp3dsp.idct_dc_add(output_plane + first_pixel, stride, block);
- }
- }
- } else {
-
- /* copy directly from the previous frame */
- s->hdsp.put_pixels_tab[1][0](
- output_plane + first_pixel,
- last_plane + first_pixel,
- stride, 8);
-
- }
- }
- }
-
- // Filter up to the last row in the superblock row
- if (!s->skip_loop_filter)
- apply_loop_filter(s, plane, 4*sb_y - !!sb_y, FFMIN(4*sb_y+3, fragment_height-1));
- }
- }
-
- /* this looks like a good place for slice dispatch... */
- /* algorithm:
- * if (slice == s->macroblock_height - 1)
- * dispatch (both last slice & 2nd-to-last slice);
- * else if (slice > 0)
- * dispatch (slice - 1);
- */
-
- vp3_draw_horiz_band(s, FFMIN((32 << s->chroma_y_shift) * (slice + 1) -16, s->height-16));
-}
-
-/// Allocate tables for per-frame data in Vp3DecodeContext
-static av_cold int allocate_tables(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- int y_fragment_count, c_fragment_count;
-
- y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
- c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
-
- s->superblock_coding = av_mallocz(s->superblock_count);
- s->all_fragments = av_mallocz(s->fragment_count * sizeof(Vp3Fragment));
- s->coded_fragment_list[0] = av_mallocz(s->fragment_count * sizeof(int));
- s->dct_tokens_base = av_mallocz(64*s->fragment_count * sizeof(*s->dct_tokens_base));
- s->motion_val[0] = av_mallocz(y_fragment_count * sizeof(*s->motion_val[0]));
- s->motion_val[1] = av_mallocz(c_fragment_count * sizeof(*s->motion_val[1]));
-
- /* work out the block mapping tables */
- s->superblock_fragments = av_mallocz(s->superblock_count * 16 * sizeof(int));
- s->macroblock_coding = av_mallocz(s->macroblock_count + 1);
-
- if (!s->superblock_coding || !s->all_fragments || !s->dct_tokens_base ||
- !s->coded_fragment_list[0] || !s->superblock_fragments || !s->macroblock_coding ||
- !s->motion_val[0] || !s->motion_val[1]) {
- vp3_decode_end(avctx);
- return -1;
- }
-
- init_block_mapping(s);
-
- return 0;
-}
-
-static av_cold int init_frames(Vp3DecodeContext *s)
-{
- s->current_frame.f = av_frame_alloc();
- s->last_frame.f = av_frame_alloc();
- s->golden_frame.f = av_frame_alloc();
-
- if (!s->current_frame.f || !s->last_frame.f || !s->golden_frame.f) {
- av_frame_free(&s->current_frame.f);
- av_frame_free(&s->last_frame.f);
- av_frame_free(&s->golden_frame.f);
- return AVERROR(ENOMEM);
- }
-
- return 0;
-}
-
-static av_cold int vp3_decode_init(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- int i, inter, plane, ret;
- int c_width;
- int c_height;
- int y_fragment_count, c_fragment_count;
-
- ret = init_frames(s);
- if (ret < 0)
- return ret;
-
- avctx->internal->allocate_progress = 1;
-
- if (avctx->codec_tag == MKTAG('V','P','3','0'))
- s->version = 0;
- else
- s->version = 1;
-
- s->avctx = avctx;
- s->width = FFALIGN(avctx->width, 16);
- s->height = FFALIGN(avctx->height, 16);
- if (avctx->codec_id != AV_CODEC_ID_THEORA)
- avctx->pix_fmt = AV_PIX_FMT_YUV420P;
- avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
- ff_hpeldsp_init(&s->hdsp, avctx->flags | CODEC_FLAG_BITEXACT);
- ff_videodsp_init(&s->vdsp, 8);
- ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
-
- for (i = 0; i < 64; i++) {
-#define T(x) (x >> 3) | ((x & 7) << 3)
- s->idct_permutation[i] = T(i);
- s->idct_scantable[i] = T(ff_zigzag_direct[i]);
-#undef T
- }
-
- /* initialize to an impossible value which will force a recalculation
- * in the first frame decode */
- for (i = 0; i < 3; i++)
- s->qps[i] = -1;
-
- avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
-
- s->y_superblock_width = (s->width + 31) / 32;
- s->y_superblock_height = (s->height + 31) / 32;
- s->y_superblock_count = s->y_superblock_width * s->y_superblock_height;
-
- /* work out the dimensions for the C planes */
- c_width = s->width >> s->chroma_x_shift;
- c_height = s->height >> s->chroma_y_shift;
- s->c_superblock_width = (c_width + 31) / 32;
- s->c_superblock_height = (c_height + 31) / 32;
- s->c_superblock_count = s->c_superblock_width * s->c_superblock_height;
-
- s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2);
- s->u_superblock_start = s->y_superblock_count;
- s->v_superblock_start = s->u_superblock_start + s->c_superblock_count;
-
- s->macroblock_width = (s->width + 15) / 16;
- s->macroblock_height = (s->height + 15) / 16;
- s->macroblock_count = s->macroblock_width * s->macroblock_height;
-
- s->fragment_width[0] = s->width / FRAGMENT_PIXELS;
- s->fragment_height[0] = s->height / FRAGMENT_PIXELS;
- s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift;
- s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift;
-
- /* fragment count covers all 8x8 blocks for all 3 planes */
- y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
- c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
- s->fragment_count = y_fragment_count + 2*c_fragment_count;
- s->fragment_start[1] = y_fragment_count;
- s->fragment_start[2] = y_fragment_count + c_fragment_count;
-
- if (!s->theora_tables)
- {
- for (i = 0; i < 64; i++) {
- s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i];
- s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i];
- s->base_matrix[0][i] = vp31_intra_y_dequant[i];
- s->base_matrix[1][i] = vp31_intra_c_dequant[i];
- s->base_matrix[2][i] = vp31_inter_dequant[i];
- s->filter_limit_values[i] = vp31_filter_limit_values[i];
- }
-
- for(inter=0; inter<2; inter++){
- for(plane=0; plane<3; plane++){
- s->qr_count[inter][plane]= 1;
- s->qr_size [inter][plane][0]= 63;
- s->qr_base [inter][plane][0]=
- s->qr_base [inter][plane][1]= 2*inter + (!!plane)*!inter;
- }
- }
-
- /* init VLC tables */
- for (i = 0; i < 16; i++) {
-
- /* DC histograms */
- init_vlc(&s->dc_vlc[i], 11, 32,
- &dc_bias[i][0][1], 4, 2,
- &dc_bias[i][0][0], 4, 2, 0);
-
- /* group 1 AC histograms */
- init_vlc(&s->ac_vlc_1[i], 11, 32,
- &ac_bias_0[i][0][1], 4, 2,
- &ac_bias_0[i][0][0], 4, 2, 0);
-
- /* group 2 AC histograms */
- init_vlc(&s->ac_vlc_2[i], 11, 32,
- &ac_bias_1[i][0][1], 4, 2,
- &ac_bias_1[i][0][0], 4, 2, 0);
-
- /* group 3 AC histograms */
- init_vlc(&s->ac_vlc_3[i], 11, 32,
- &ac_bias_2[i][0][1], 4, 2,
- &ac_bias_2[i][0][0], 4, 2, 0);
-
- /* group 4 AC histograms */
- init_vlc(&s->ac_vlc_4[i], 11, 32,
- &ac_bias_3[i][0][1], 4, 2,
- &ac_bias_3[i][0][0], 4, 2, 0);
- }
- } else {
-
- for (i = 0; i < 16; i++) {
- /* DC histograms */
- if (init_vlc(&s->dc_vlc[i], 11, 32,
- &s->huffman_table[i][0][1], 8, 4,
- &s->huffman_table[i][0][0], 8, 4, 0) < 0)
- goto vlc_fail;
-
- /* group 1 AC histograms */
- if (init_vlc(&s->ac_vlc_1[i], 11, 32,
- &s->huffman_table[i+16][0][1], 8, 4,
- &s->huffman_table[i+16][0][0], 8, 4, 0) < 0)
- goto vlc_fail;
-
- /* group 2 AC histograms */
- if (init_vlc(&s->ac_vlc_2[i], 11, 32,
- &s->huffman_table[i+16*2][0][1], 8, 4,
- &s->huffman_table[i+16*2][0][0], 8, 4, 0) < 0)
- goto vlc_fail;
-
- /* group 3 AC histograms */
- if (init_vlc(&s->ac_vlc_3[i], 11, 32,
- &s->huffman_table[i+16*3][0][1], 8, 4,
- &s->huffman_table[i+16*3][0][0], 8, 4, 0) < 0)
- goto vlc_fail;
-
- /* group 4 AC histograms */
- if (init_vlc(&s->ac_vlc_4[i], 11, 32,
- &s->huffman_table[i+16*4][0][1], 8, 4,
- &s->huffman_table[i+16*4][0][0], 8, 4, 0) < 0)
- goto vlc_fail;
- }
- }
-
- init_vlc(&s->superblock_run_length_vlc, 6, 34,
- &superblock_run_length_vlc_table[0][1], 4, 2,
- &superblock_run_length_vlc_table[0][0], 4, 2, 0);
-
- init_vlc(&s->fragment_run_length_vlc, 5, 30,
- &fragment_run_length_vlc_table[0][1], 4, 2,
- &fragment_run_length_vlc_table[0][0], 4, 2, 0);
-
- init_vlc(&s->mode_code_vlc, 3, 8,
- &mode_code_vlc_table[0][1], 2, 1,
- &mode_code_vlc_table[0][0], 2, 1, 0);
-
- init_vlc(&s->motion_vector_vlc, 6, 63,
- &motion_vector_vlc_table[0][1], 2, 1,
- &motion_vector_vlc_table[0][0], 2, 1, 0);
-
- return allocate_tables(avctx);
-
-vlc_fail:
- av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n");
- return -1;
-}
-
-/// Release and shuffle frames after decode finishes
-static int update_frames(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- int ret = 0;
-
-
- /* shuffle frames (last = current) */
- ff_thread_release_buffer(avctx, &s->last_frame);
- ret = ff_thread_ref_frame(&s->last_frame, &s->current_frame);
- if (ret < 0)
- goto fail;
-
- if (s->keyframe) {
- ff_thread_release_buffer(avctx, &s->golden_frame);
- ret = ff_thread_ref_frame(&s->golden_frame, &s->current_frame);
- }
-
-fail:
- ff_thread_release_buffer(avctx, &s->current_frame);
- return ret;
-}
-
-static int ref_frame(Vp3DecodeContext *s, ThreadFrame *dst, ThreadFrame *src)
-{
- ff_thread_release_buffer(s->avctx, dst);
- if (src->f->data[0])
- return ff_thread_ref_frame(dst, src);
- return 0;
-}
-
-static int ref_frames(Vp3DecodeContext *dst, Vp3DecodeContext *src)
-{
- int ret;
- if ((ret = ref_frame(dst, &dst->current_frame, &src->current_frame)) < 0 ||
- (ret = ref_frame(dst, &dst->golden_frame, &src->golden_frame)) < 0 ||
- (ret = ref_frame(dst, &dst->last_frame, &src->last_frame)) < 0)
- return ret;
- return 0;
-}
-
-static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
-{
- Vp3DecodeContext *s = dst->priv_data, *s1 = src->priv_data;
- int qps_changed = 0, i, err;
-
-#define copy_fields(to, from, start_field, end_field) memcpy(&to->start_field, &from->start_field, (char*)&to->end_field - (char*)&to->start_field)
-
- if (!s1->current_frame.f->data[0]
- ||s->width != s1->width
- ||s->height!= s1->height) {
- if (s != s1)
- ref_frames(s, s1);
- return -1;
- }
-
- if (s != s1) {
- // init tables if the first frame hasn't been decoded
- if (!s->current_frame.f->data[0]) {
- int y_fragment_count, c_fragment_count;
- s->avctx = dst;
- err = allocate_tables(dst);
- if (err)
- return err;
- y_fragment_count = s->fragment_width[0] * s->fragment_height[0];
- c_fragment_count = s->fragment_width[1] * s->fragment_height[1];
- memcpy(s->motion_val[0], s1->motion_val[0], y_fragment_count * sizeof(*s->motion_val[0]));
- memcpy(s->motion_val[1], s1->motion_val[1], c_fragment_count * sizeof(*s->motion_val[1]));
- }
-
- // copy previous frame data
- if ((err = ref_frames(s, s1)) < 0)
- return err;
-
- s->keyframe = s1->keyframe;
-
- // copy qscale data if necessary
- for (i = 0; i < 3; i++) {
- if (s->qps[i] != s1->qps[1]) {
- qps_changed = 1;
- memcpy(&s->qmat[i], &s1->qmat[i], sizeof(s->qmat[i]));
- }
- }
-
- if (s->qps[0] != s1->qps[0])
- memcpy(&s->bounding_values_array, &s1->bounding_values_array, sizeof(s->bounding_values_array));
-
- if (qps_changed)
- copy_fields(s, s1, qps, superblock_count);
-#undef copy_fields
- }
-
- return update_frames(dst);
-}
-
-static int vp3_decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- Vp3DecodeContext *s = avctx->priv_data;
- GetBitContext gb;
- int i, ret;
-
- init_get_bits(&gb, buf, buf_size * 8);
-
-#if CONFIG_THEORA_DECODER
- if (s->theora && get_bits1(&gb))
- {
- int type = get_bits(&gb, 7);
- skip_bits_long(&gb, 6*8); /* "theora" */
-
- if (s->avctx->active_thread_type&FF_THREAD_FRAME) {
- av_log(avctx, AV_LOG_ERROR, "midstream reconfiguration with multithreading is unsupported, try -threads 1\n");
- return AVERROR_PATCHWELCOME;
- }
- if (type == 0) {
- vp3_decode_end(avctx);
- ret = theora_decode_header(avctx, &gb);
-
- if (ret < 0) {
- vp3_decode_end(avctx);
- } else
- ret = vp3_decode_init(avctx);
- return ret;
- } else if (type == 2) {
- ret = theora_decode_tables(avctx, &gb);
- if (ret < 0) {
- vp3_decode_end(avctx);
- } else
- ret = vp3_decode_init(avctx);
- return ret;
- }
-
- av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n");
- return -1;
- }
-#endif
-
- s->keyframe = !get_bits1(&gb);
- if (!s->all_fragments) {
- av_log(avctx, AV_LOG_ERROR, "Data packet without prior valid headers\n");
- return -1;
- }
- if (!s->theora)
- skip_bits(&gb, 1);
- for (i = 0; i < 3; i++)
- s->last_qps[i] = s->qps[i];
-
- s->nqps=0;
- do{
- s->qps[s->nqps++]= get_bits(&gb, 6);
- } while(s->theora >= 0x030200 && s->nqps<3 && get_bits1(&gb));
- for (i = s->nqps; i < 3; i++)
- s->qps[i] = -1;
-
- if (s->avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n",
- s->keyframe?"key":"", avctx->frame_number+1, s->qps[0]);
-
- s->skip_loop_filter = !s->filter_limit_values[s->qps[0]] ||
- avctx->skip_loop_filter >= (s->keyframe ? AVDISCARD_ALL : AVDISCARD_NONKEY);
-
- if (s->qps[0] != s->last_qps[0])
- init_loop_filter(s);
-
- for (i = 0; i < s->nqps; i++)
- // reinit all dequantizers if the first one changed, because
- // the DC of the first quantizer must be used for all matrices
- if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0])
- init_dequantizer(s, i);
-
- if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe)
- return buf_size;
-
- s->current_frame.f->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
- s->current_frame.f->key_frame = s->keyframe;
- if (ff_thread_get_buffer(avctx, &s->current_frame, AV_GET_BUFFER_FLAG_REF) < 0)
- goto error;
-
- if (!s->edge_emu_buffer)
- s->edge_emu_buffer = av_malloc(9*FFABS(s->current_frame.f->linesize[0]));
-
- if (s->keyframe) {
- if (!s->theora)
- {
- skip_bits(&gb, 4); /* width code */
- skip_bits(&gb, 4); /* height code */
- if (s->version)
- {
- s->version = get_bits(&gb, 5);
- if (avctx->frame_number == 0)
- av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version);
- }
- }
- if (s->version || s->theora)
- {
- if (get_bits1(&gb))
- av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n");
- skip_bits(&gb, 2); /* reserved? */
- }
- } else {
- if (!s->golden_frame.f->data[0]) {
- av_log(s->avctx, AV_LOG_WARNING, "vp3: first frame not a keyframe\n");
-
- s->golden_frame.f->pict_type = AV_PICTURE_TYPE_I;
- if (ff_thread_get_buffer(avctx, &s->golden_frame, AV_GET_BUFFER_FLAG_REF) < 0)
- goto error;
- ff_thread_release_buffer(avctx, &s->last_frame);
- if ((ret = ff_thread_ref_frame(&s->last_frame, &s->golden_frame)) < 0)
- goto error;
- ff_thread_report_progress(&s->last_frame, INT_MAX, 0);
- }
- }
-
- memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment));
- ff_thread_finish_setup(avctx);
-
- if (unpack_superblocks(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n");
- goto error;
- }
- if (unpack_modes(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n");
- goto error;
- }
- if (unpack_vectors(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n");
- goto error;
- }
- if (unpack_block_qpis(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n");
- goto error;
- }
- if (unpack_dct_coeffs(s, &gb)){
- av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n");
- goto error;
- }
-
- for (i = 0; i < 3; i++) {
- int height = s->height >> (i && s->chroma_y_shift);
- if (s->flipped_image)
- s->data_offset[i] = 0;
- else
- s->data_offset[i] = (height-1) * s->current_frame.f->linesize[i];
- }
-
- s->last_slice_end = 0;
- for (i = 0; i < s->c_superblock_height; i++)
- render_slice(s, i);
-
- // filter the last row
- for (i = 0; i < 3; i++) {
- int row = (s->height >> (3+(i && s->chroma_y_shift))) - 1;
- apply_loop_filter(s, i, row, row+1);
- }
- vp3_draw_horiz_band(s, s->avctx->height);
-
- if ((ret = av_frame_ref(data, s->current_frame.f)) < 0)
- return ret;
- *got_frame = 1;
-
- if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_FRAME)) {
- ret = update_frames(avctx);
- if (ret < 0)
- return ret;
- }
-
- return buf_size;
-
-error:
- ff_thread_report_progress(&s->current_frame, INT_MAX, 0);
-
- if (!HAVE_THREADS || !(s->avctx->active_thread_type&FF_THREAD_FRAME))
- av_frame_unref(s->current_frame.f);
-
- return -1;
-}
-
-static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb)
-{
- Vp3DecodeContext *s = avctx->priv_data;
-
- if (get_bits1(gb)) {
- int token;
- if (s->entries >= 32) { /* overflow */
- av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
- return -1;
- }
- token = get_bits(gb, 5);
- av_dlog(avctx, "hti %d hbits %x token %d entry : %d size %d\n",
- s->hti, s->hbits, token, s->entries, s->huff_code_size);
- s->huffman_table[s->hti][token][0] = s->hbits;
- s->huffman_table[s->hti][token][1] = s->huff_code_size;
- s->entries++;
- }
- else {
- if (s->huff_code_size >= 32) {/* overflow */
- av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n");
- return -1;
- }
- s->huff_code_size++;
- s->hbits <<= 1;
- if (read_huffman_tree(avctx, gb))
- return -1;
- s->hbits |= 1;
- if (read_huffman_tree(avctx, gb))
- return -1;
- s->hbits >>= 1;
- s->huff_code_size--;
- }
- return 0;
-}
-
-static int vp3_init_thread_copy(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
-
- s->superblock_coding = NULL;
- s->all_fragments = NULL;
- s->coded_fragment_list[0] = NULL;
- s->dct_tokens_base = NULL;
- s->superblock_fragments = NULL;
- s->macroblock_coding = NULL;
- s->motion_val[0] = NULL;
- s->motion_val[1] = NULL;
- s->edge_emu_buffer = NULL;
-
- return init_frames(s);
-}
-
-#if CONFIG_THEORA_DECODER
-static const enum AVPixelFormat theora_pix_fmts[4] = {
- AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P
-};
-
-static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- int visible_width, visible_height, colorspace;
- int offset_x = 0, offset_y = 0;
- int ret;
- AVRational fps, aspect;
-
- s->theora = get_bits_long(gb, 24);
- av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
-
- /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 */
- /* but previous versions have the image flipped relative to vp3 */
- if (s->theora < 0x030200)
- {
- s->flipped_image = 1;
- av_log(avctx, AV_LOG_DEBUG, "Old (<alpha3) Theora bitstream, flipped image\n");
- }
-
- visible_width = s->width = get_bits(gb, 16) << 4;
- visible_height = s->height = get_bits(gb, 16) << 4;
-
- if (s->theora >= 0x030200) {
- visible_width = get_bits_long(gb, 24);
- visible_height = get_bits_long(gb, 24);
-
- offset_x = get_bits(gb, 8); /* offset x */
- offset_y = get_bits(gb, 8); /* offset y, from bottom */
- }
-
- fps.num = get_bits_long(gb, 32);
- fps.den = get_bits_long(gb, 32);
- if (fps.num && fps.den) {
- if (fps.num < 0 || fps.den < 0) {
- av_log(avctx, AV_LOG_ERROR, "Invalid framerate\n");
- return AVERROR_INVALIDDATA;
- }
- av_reduce(&avctx->time_base.num, &avctx->time_base.den,
- fps.den, fps.num, 1<<30);
- }
-
- aspect.num = get_bits_long(gb, 24);
- aspect.den = get_bits_long(gb, 24);
- if (aspect.num && aspect.den) {
- av_reduce(&avctx->sample_aspect_ratio.num,
- &avctx->sample_aspect_ratio.den,
- aspect.num, aspect.den, 1<<30);
- }
-
- if (s->theora < 0x030200)
- skip_bits(gb, 5); /* keyframe frequency force */
- colorspace = get_bits(gb, 8);
- skip_bits(gb, 24); /* bitrate */
-
- skip_bits(gb, 6); /* quality hint */
-
- if (s->theora >= 0x030200)
- {
- skip_bits(gb, 5); /* keyframe frequency force */
- avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)];
- if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
- av_log(avctx, AV_LOG_ERROR, "Invalid pixel format\n");
- return AVERROR_INVALIDDATA;
- }
- skip_bits(gb, 3); /* reserved */
- }
-
-// align_get_bits(gb);
-
- if ( visible_width <= s->width && visible_width > s->width-16
- && visible_height <= s->height && visible_height > s->height-16
- && !offset_x && (offset_y == s->height - visible_height))
- ret = ff_set_dimensions(avctx, visible_width, visible_height);
- else
- ret = ff_set_dimensions(avctx, s->width, s->height);
- if (ret < 0)
- return ret;
-
- if (colorspace == 1) {
- avctx->color_primaries = AVCOL_PRI_BT470M;
- } else if (colorspace == 2) {
- avctx->color_primaries = AVCOL_PRI_BT470BG;
- }
- if (colorspace == 1 || colorspace == 2) {
- avctx->colorspace = AVCOL_SPC_BT470BG;
- avctx->color_trc = AVCOL_TRC_BT709;
- }
-
- return 0;
-}
-
-static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- int i, n, matrices, inter, plane;
-
- if (s->theora >= 0x030200) {
- n = get_bits(gb, 3);
- /* loop filter limit values table */
- if (n)
- for (i = 0; i < 64; i++)
- s->filter_limit_values[i] = get_bits(gb, n);
- }
-
- if (s->theora >= 0x030200)
- n = get_bits(gb, 4) + 1;
- else
- n = 16;
- /* quality threshold table */
- for (i = 0; i < 64; i++)
- s->coded_ac_scale_factor[i] = get_bits(gb, n);
-
- if (s->theora >= 0x030200)
- n = get_bits(gb, 4) + 1;
- else
- n = 16;
- /* dc scale factor table */
- for (i = 0; i < 64; i++)
- s->coded_dc_scale_factor[i] = get_bits(gb, n);
-
- if (s->theora >= 0x030200)
- matrices = get_bits(gb, 9) + 1;
- else
- matrices = 3;
-
- if(matrices > 384){
- av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n");
- return -1;
- }
-
- for(n=0; n<matrices; n++){
- for (i = 0; i < 64; i++)
- s->base_matrix[n][i]= get_bits(gb, 8);
- }
-
- for (inter = 0; inter <= 1; inter++) {
- for (plane = 0; plane <= 2; plane++) {
- int newqr= 1;
- if (inter || plane > 0)
- newqr = get_bits1(gb);
- if (!newqr) {
- int qtj, plj;
- if(inter && get_bits1(gb)){
- qtj = 0;
- plj = plane;
- }else{
- qtj= (3*inter + plane - 1) / 3;
- plj= (plane + 2) % 3;
- }
- s->qr_count[inter][plane]= s->qr_count[qtj][plj];
- memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], sizeof(s->qr_size[0][0]));
- memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], sizeof(s->qr_base[0][0]));
- } else {
- int qri= 0;
- int qi = 0;
-
- for(;;){
- i= get_bits(gb, av_log2(matrices-1)+1);
- if(i>= matrices){
- av_log(avctx, AV_LOG_ERROR, "invalid base matrix index\n");
- return -1;
- }
- s->qr_base[inter][plane][qri]= i;
- if(qi >= 63)
- break;
- i = get_bits(gb, av_log2(63-qi)+1) + 1;
- s->qr_size[inter][plane][qri++]= i;
- qi += i;
- }
-
- if (qi > 63) {
- av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi);
- return -1;
- }
- s->qr_count[inter][plane]= qri;
- }
- }
- }
-
- /* Huffman tables */
- for (s->hti = 0; s->hti < 80; s->hti++) {
- s->entries = 0;
- s->huff_code_size = 1;
- if (!get_bits1(gb)) {
- s->hbits = 0;
- if(read_huffman_tree(avctx, gb))
- return -1;
- s->hbits = 1;
- if(read_huffman_tree(avctx, gb))
- return -1;
- }
- }
-
- s->theora_tables = 1;
-
- return 0;
-}
-
-static av_cold int theora_decode_init(AVCodecContext *avctx)
-{
- Vp3DecodeContext *s = avctx->priv_data;
- GetBitContext gb;
- int ptype;
- uint8_t *header_start[3];
- int header_len[3];
- int i;
-
- avctx->pix_fmt = AV_PIX_FMT_YUV420P;
-
- s->theora = 1;
-
- if (!avctx->extradata_size)
- {
- av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n");
- return -1;
- }
-
- if (avpriv_split_xiph_headers(avctx->extradata, avctx->extradata_size,
- 42, header_start, header_len) < 0) {
- av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n");
- return -1;
- }
-
- for(i=0;i<3;i++) {
- if (header_len[i] <= 0)
- continue;
- init_get_bits(&gb, header_start[i], header_len[i] * 8);
-
- ptype = get_bits(&gb, 8);
-
- if (!(ptype & 0x80))
- {
- av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n");
-// return -1;
- }
-
- // FIXME: Check for this as well.
- skip_bits_long(&gb, 6*8); /* "theora" */
-
- switch(ptype)
- {
- case 0x80:
- if (theora_decode_header(avctx, &gb) < 0)
- return -1;
- break;
- case 0x81:
-// FIXME: is this needed? it breaks sometimes
-// theora_decode_comments(avctx, gb);
- break;
- case 0x82:
- if (theora_decode_tables(avctx, &gb))
- return -1;
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Unknown Theora config packet: %d\n", ptype&~0x80);
- break;
- }
- if(ptype != 0x81 && 8*header_len[i] != get_bits_count(&gb))
- av_log(avctx, AV_LOG_WARNING, "%d bits left in packet %X\n", 8*header_len[i] - get_bits_count(&gb), ptype);
- if (s->theora < 0x030200)
- break;
- }
-
- return vp3_decode_init(avctx);
-}
-
-AVCodec ff_theora_decoder = {
- .name = "theora",
- .long_name = NULL_IF_CONFIG_SMALL("Theora"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_THEORA,
- .priv_data_size = sizeof(Vp3DecodeContext),
- .init = theora_decode_init,
- .close = vp3_decode_end,
- .decode = vp3_decode_frame,
- .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
- CODEC_CAP_FRAME_THREADS,
- .flush = vp3_decode_flush,
- .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
- .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context)
-};
-#endif
-
-AVCodec ff_vp3_decoder = {
- .name = "vp3",
- .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_VP3,
- .priv_data_size = sizeof(Vp3DecodeContext),
- .init = vp3_decode_init,
- .close = vp3_decode_end,
- .decode = vp3_decode_frame,
- .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
- CODEC_CAP_FRAME_THREADS,
- .flush = vp3_decode_flush,
- .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
- .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 14:15:54 +0000