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Diffstat (limited to 'ffmpeg1/libavcodec/eamad.c')
-rw-r--r--ffmpeg1/libavcodec/eamad.c327
1 files changed, 0 insertions, 327 deletions
diff --git a/ffmpeg1/libavcodec/eamad.c b/ffmpeg1/libavcodec/eamad.c
deleted file mode 100644
index 58cdea6..0000000
--- a/ffmpeg1/libavcodec/eamad.c
+++ /dev/null
@@ -1,327 +0,0 @@
-/*
- * Electronic Arts Madcow Video Decoder
- * Copyright (c) 2007-2009 Peter Ross
- *
- * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * Electronic Arts Madcow Video Decoder
- * @author Peter Ross <pross@xvid.org>
- *
- * @see technical details at
- * http://wiki.multimedia.cx/index.php?title=Electronic_Arts_MAD
- */
-
-#include "avcodec.h"
-#include "get_bits.h"
-#include "aandcttab.h"
-#include "eaidct.h"
-#include "internal.h"
-#include "mpeg12.h"
-#include "mpeg12data.h"
-#include "libavutil/imgutils.h"
-
-#define EA_PREAMBLE_SIZE 8
-#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */
-#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD p-frame */
-#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
-
-typedef struct MadContext {
- AVCodecContext *avctx;
- DSPContext dsp;
- AVFrame last_frame;
- GetBitContext gb;
- void *bitstream_buf;
- unsigned int bitstream_buf_size;
- DECLARE_ALIGNED(16, int16_t, block)[64];
- ScanTable scantable;
- uint16_t quant_matrix[64];
- int mb_x;
- int mb_y;
-} MadContext;
-
-static av_cold int decode_init(AVCodecContext *avctx)
-{
- MadContext *s = avctx->priv_data;
- s->avctx = avctx;
- avctx->pix_fmt = AV_PIX_FMT_YUV420P;
- ff_dsputil_init(&s->dsp, avctx);
- ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
- ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
- ff_mpeg12_init_vlcs();
- return 0;
-}
-
-static inline void comp(unsigned char *dst, int dst_stride,
- unsigned char *src, int src_stride, int add)
-{
- int j, i;
- for (j=0; j<8; j++)
- for (i=0; i<8; i++)
- dst[j*dst_stride + i] = av_clip_uint8(src[j*src_stride + i] + add);
-}
-
-static inline void comp_block(MadContext *t, AVFrame *frame,
- int mb_x, int mb_y,
- int j, int mv_x, int mv_y, int add)
-{
- if (j < 4) {
- unsigned offset = (mb_y*16 + ((j&2)<<2) + mv_y)*t->last_frame.linesize[0] + mb_x*16 + ((j&1)<<3) + mv_x;
- if (offset >= (t->avctx->height - 7) * t->last_frame.linesize[0] - 7)
- return;
- comp(frame->data[0] + (mb_y*16 + ((j&2)<<2))*frame->linesize[0] + mb_x*16 + ((j&1)<<3),
- frame->linesize[0],
- t->last_frame.data[0] + offset,
- t->last_frame.linesize[0], add);
- } else if (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
- int index = j - 3;
- unsigned offset = (mb_y * 8 + (mv_y/2))*t->last_frame.linesize[index] + mb_x * 8 + (mv_x/2);
- if (offset >= (t->avctx->height/2 - 7) * t->last_frame.linesize[index] - 7)
- return;
- comp(frame->data[index] + (mb_y*8)*frame->linesize[index] + mb_x * 8,
- frame->linesize[index],
- t->last_frame.data[index] + offset,
- t->last_frame.linesize[index], add);
- }
-}
-
-static inline void idct_put(MadContext *t, AVFrame *frame, int16_t *block,
- int mb_x, int mb_y, int j)
-{
- if (j < 4) {
- ff_ea_idct_put_c(
- frame->data[0] + (mb_y*16 + ((j&2)<<2))*frame->linesize[0] + mb_x*16 + ((j&1)<<3),
- frame->linesize[0], block);
- } else if (!(t->avctx->flags & CODEC_FLAG_GRAY)) {
- int index = j - 3;
- ff_ea_idct_put_c(
- frame->data[index] + (mb_y*8)*frame->linesize[index] + mb_x*8,
- frame->linesize[index], block);
- }
-}
-
-static inline int decode_block_intra(MadContext *s, int16_t * block)
-{
- int level, i, j, run;
- RLTable *rl = &ff_rl_mpeg1;
- const uint8_t *scantable = s->scantable.permutated;
- int16_t *quant_matrix = s->quant_matrix;
-
- block[0] = (128 + get_sbits(&s->gb, 8)) * quant_matrix[0];
-
- /* The RL decoder is derived from mpeg1_decode_block_intra;
- Escaped level and run values a decoded differently */
- i = 0;
- {
- OPEN_READER(re, &s->gb);
- /* now quantify & encode AC coefficients */
- for (;;) {
- UPDATE_CACHE(re, &s->gb);
- GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
-
- if (level == 127) {
- break;
- } else if (level != 0) {
- i += run;
- j = scantable[i];
- level = (level*quant_matrix[j]) >> 4;
- level = (level-1)|1;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- LAST_SKIP_BITS(re, &s->gb, 1);
- } else {
- /* escape */
- UPDATE_CACHE(re, &s->gb);
- level = SHOW_SBITS(re, &s->gb, 10); SKIP_BITS(re, &s->gb, 10);
-
- UPDATE_CACHE(re, &s->gb);
- run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6);
-
- i += run;
- j = scantable[i];
- if (level < 0) {
- level = -level;
- level = (level*quant_matrix[j]) >> 4;
- level = (level-1)|1;
- level = -level;
- } else {
- level = (level*quant_matrix[j]) >> 4;
- level = (level-1)|1;
- }
- }
- if (i > 63) {
- av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
-
- block[j] = level;
- }
- CLOSE_READER(re, &s->gb);
- }
- return 0;
-}
-
-static int decode_motion(GetBitContext *gb)
-{
- int value = 0;
- if (get_bits1(gb)) {
- if (get_bits1(gb))
- value = -17;
- value += get_bits(gb, 4) + 1;
- }
- return value;
-}
-
-static int decode_mb(MadContext *s, AVFrame *frame, int inter)
-{
- int mv_map = 0;
- int mv_x, mv_y;
- int j;
-
- if (inter) {
- int v = decode210(&s->gb);
- if (v < 2) {
- mv_map = v ? get_bits(&s->gb, 6) : 63;
- mv_x = decode_motion(&s->gb);
- mv_y = decode_motion(&s->gb);
- }
- }
-
- for (j=0; j<6; j++) {
- if (mv_map & (1<<j)) { // mv_x and mv_y are guarded by mv_map
- int add = 2*decode_motion(&s->gb);
- if (s->last_frame.data[0])
- comp_block(s, frame, s->mb_x, s->mb_y, j, mv_x, mv_y, add);
- } else {
- s->dsp.clear_block(s->block);
- if(decode_block_intra(s, s->block) < 0)
- return -1;
- idct_put(s, frame, s->block, s->mb_x, s->mb_y, j);
- }
- }
- return 0;
-}
-
-static void calc_quant_matrix(MadContext *s, int qscale)
-{
- int i;
-
- s->quant_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0]) >> 11;
- for (i=1; i<64; i++)
- s->quant_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32) >> 10;
-}
-
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- const uint8_t *buf_end = buf+buf_size;
- MadContext *s = avctx->priv_data;
- AVFrame *frame = data;
- int width, height;
- int chunk_type;
- int inter, ret;
-
- if (buf_size < 26) {
- av_log(avctx, AV_LOG_ERROR, "Input buffer too small\n");
- *got_frame = 0;
- return AVERROR_INVALIDDATA;
- }
-
- chunk_type = AV_RL32(&buf[0]);
- inter = (chunk_type == MADm_TAG || chunk_type == MADe_TAG);
- buf += 8;
-
- av_reduce(&avctx->time_base.num, &avctx->time_base.den,
- AV_RL16(&buf[6]), 1000, 1<<30);
-
- width = AV_RL16(&buf[8]);
- height = AV_RL16(&buf[10]);
- calc_quant_matrix(s, buf[13]);
- buf += 16;
-
- if (avctx->width != width || avctx->height != height) {
- if((width * height)/2048*7 > buf_end-buf)
- return AVERROR_INVALIDDATA;
- if ((ret = av_image_check_size(width, height, 0, avctx)) < 0)
- return ret;
- avcodec_set_dimensions(avctx, width, height);
- av_frame_unref(&s->last_frame);
- }
-
- if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
- return ret;
-
- if (inter && !s->last_frame.data[0]) {
- av_log(avctx, AV_LOG_WARNING, "Missing reference frame.\n");
- ret = ff_get_buffer(avctx, &s->last_frame, AV_GET_BUFFER_FLAG_REF);
- if (ret < 0)
- return ret;
- memset(s->last_frame.data[0], 0, s->last_frame.height *
- s->last_frame.linesize[0]);
- memset(s->last_frame.data[1], 0x80, s->last_frame.height / 2 *
- s->last_frame.linesize[1]);
- memset(s->last_frame.data[2], 0x80, s->last_frame.height / 2 *
- s->last_frame.linesize[2]);
- }
-
- av_fast_padded_malloc(&s->bitstream_buf, &s->bitstream_buf_size,
- buf_end - buf);
- if (!s->bitstream_buf)
- return AVERROR(ENOMEM);
- s->dsp.bswap16_buf(s->bitstream_buf, (const uint16_t*)buf, (buf_end-buf)/2);
- memset((uint8_t*)s->bitstream_buf + (buf_end-buf), 0, FF_INPUT_BUFFER_PADDING_SIZE);
- init_get_bits(&s->gb, s->bitstream_buf, 8*(buf_end-buf));
-
- for (s->mb_y=0; s->mb_y < (avctx->height+15)/16; s->mb_y++)
- for (s->mb_x=0; s->mb_x < (avctx->width +15)/16; s->mb_x++)
- if(decode_mb(s, frame, inter) < 0)
- return AVERROR_INVALIDDATA;
-
- *got_frame = 1;
-
- if (chunk_type != MADe_TAG) {
- av_frame_unref(&s->last_frame);
- if ((ret = av_frame_ref(&s->last_frame, frame)) < 0)
- return ret;
- }
-
- return buf_size;
-}
-
-static av_cold int decode_end(AVCodecContext *avctx)
-{
- MadContext *t = avctx->priv_data;
- av_frame_unref(&t->last_frame);
- av_free(t->bitstream_buf);
- return 0;
-}
-
-AVCodec ff_eamad_decoder = {
- .name = "eamad",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_MAD,
- .priv_data_size = sizeof(MadContext),
- .init = decode_init,
- .close = decode_end,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts Madcow Video")
-};
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