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Diffstat (limited to 'ffmpeg1/libavcodec/dnxhddec.c')
-rw-r--r--ffmpeg1/libavcodec/dnxhddec.c427
1 files changed, 0 insertions, 427 deletions
diff --git a/ffmpeg1/libavcodec/dnxhddec.c b/ffmpeg1/libavcodec/dnxhddec.c
deleted file mode 100644
index 11bed00..0000000
--- a/ffmpeg1/libavcodec/dnxhddec.c
+++ /dev/null
@@ -1,427 +0,0 @@
-/*
- * VC3/DNxHD decoder.
- * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
- * Copyright (c) 2011 MirriAd Ltd
- *
- * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
- *
- * 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
- */
-
-//#define TRACE
-//#define DEBUG
-
-#include "libavutil/imgutils.h"
-#include "avcodec.h"
-#include "get_bits.h"
-#include "dnxhddata.h"
-#include "dsputil.h"
-#include "internal.h"
-#include "thread.h"
-
-typedef struct DNXHDContext {
- AVCodecContext *avctx;
- GetBitContext gb;
- int64_t cid; ///< compression id
- unsigned int width, height;
- unsigned int mb_width, mb_height;
- uint32_t mb_scan_index[68]; /* max for 1080p */
- int cur_field; ///< current interlaced field
- VLC ac_vlc, dc_vlc, run_vlc;
- int last_dc[3];
- DSPContext dsp;
- DECLARE_ALIGNED(16, int16_t, blocks)[8][64];
- ScanTable scantable;
- const CIDEntry *cid_table;
- int bit_depth; // 8, 10 or 0 if not initialized at all.
- void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block,
- int n, int qscale);
- int last_qscale;
- int luma_scale[64];
- int chroma_scale[64];
-} DNXHDContext;
-
-#define DNXHD_VLC_BITS 9
-#define DNXHD_DC_VLC_BITS 7
-
-static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block, int n, int qscale);
-static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block, int n, int qscale);
-
-static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
-{
- DNXHDContext *ctx = avctx->priv_data;
-
- ctx->avctx = avctx;
- ctx->cid = -1;
- return 0;
-}
-
-static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid)
-{
- if (cid != ctx->cid) {
- int index;
-
- if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
- av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid);
- return -1;
- }
- if (ff_dnxhd_cid_table[index].bit_depth != ctx->bit_depth) {
- av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, ctx->bit_depth);
- return AVERROR_INVALIDDATA;
- }
- ctx->cid_table = &ff_dnxhd_cid_table[index];
-
- ff_free_vlc(&ctx->ac_vlc);
- ff_free_vlc(&ctx->dc_vlc);
- ff_free_vlc(&ctx->run_vlc);
-
- init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
- ctx->cid_table->ac_bits, 1, 1,
- ctx->cid_table->ac_codes, 2, 2, 0);
- init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->bit_depth + 4,
- ctx->cid_table->dc_bits, 1, 1,
- ctx->cid_table->dc_codes, 1, 1, 0);
- init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
- ctx->cid_table->run_bits, 1, 1,
- ctx->cid_table->run_codes, 2, 2, 0);
-
- ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, ff_zigzag_direct);
- ctx->cid = cid;
- }
- return 0;
-}
-
-static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
- const uint8_t *buf, int buf_size, int first_field)
-{
- static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 };
- int i, cid;
-
- if (buf_size < 0x280)
- return -1;
-
- if (memcmp(buf, header_prefix, 5)) {
- av_log(ctx->avctx, AV_LOG_ERROR, "error in header\n");
- return -1;
- }
- if (buf[5] & 2) { /* interlaced */
- ctx->cur_field = buf[5] & 1;
- frame->interlaced_frame = 1;
- frame->top_field_first = first_field ^ ctx->cur_field;
- av_log(ctx->avctx, AV_LOG_DEBUG, "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
- }
-
- ctx->height = AV_RB16(buf + 0x18);
- ctx->width = AV_RB16(buf + 0x1a);
-
- av_dlog(ctx->avctx, "width %d, height %d\n", ctx->width, ctx->height);
-
- if (buf[0x21] & 0x40) {
- ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
- ctx->avctx->bits_per_raw_sample = 10;
- if (ctx->bit_depth != 10) {
- ff_dsputil_init(&ctx->dsp, ctx->avctx);
- ctx->bit_depth = 10;
- ctx->decode_dct_block = dnxhd_decode_dct_block_10;
- }
- } else {
- ctx->avctx->pix_fmt = AV_PIX_FMT_YUV422P;
- ctx->avctx->bits_per_raw_sample = 8;
- if (ctx->bit_depth != 8) {
- ff_dsputil_init(&ctx->dsp, ctx->avctx);
- ctx->bit_depth = 8;
- ctx->decode_dct_block = dnxhd_decode_dct_block_8;
- }
- }
-
- cid = AV_RB32(buf + 0x28);
- av_dlog(ctx->avctx, "compression id %d\n", cid);
-
- if (dnxhd_init_vlc(ctx, cid) < 0)
- return -1;
-
- if (buf_size < ctx->cid_table->coding_unit_size) {
- av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size\n");
- return -1;
- }
-
- ctx->mb_width = ctx->width>>4;
- ctx->mb_height = buf[0x16d];
-
- av_dlog(ctx->avctx, "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
-
- if ((ctx->height+15)>>4 == ctx->mb_height && frame->interlaced_frame)
- ctx->height <<= 1;
-
- if (ctx->mb_height > 68 ||
- (ctx->mb_height << frame->interlaced_frame) > (ctx->height+15)>>4) {
- av_log(ctx->avctx, AV_LOG_ERROR, "mb height too big: %d\n", ctx->mb_height);
- return -1;
- }
-
- for (i = 0; i < ctx->mb_height; i++) {
- ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i<<2));
- av_dlog(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
- if (buf_size < ctx->mb_scan_index[i] + 0x280LL) {
- av_log(ctx->avctx, AV_LOG_ERROR, "invalid mb scan index\n");
- return -1;
- }
- }
-
- return 0;
-}
-
-static av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx,
- int16_t *block, int n,
- int qscale,
- int index_bits,
- int level_bias,
- int level_shift)
-{
- int i, j, index1, index2, len, flags;
- int level, component, sign;
- const int *scale;
- const uint8_t *weight_matrix;
- const uint8_t *ac_level = ctx->cid_table->ac_level;
- const uint8_t *ac_flags = ctx->cid_table->ac_flags;
- const int eob_index = ctx->cid_table->eob_index;
- OPEN_READER(bs, &ctx->gb);
-
- if (n&2) {
- component = 1 + (n&1);
- scale = ctx->chroma_scale;
- weight_matrix = ctx->cid_table->chroma_weight;
- } else {
- component = 0;
- scale = ctx->luma_scale;
- weight_matrix = ctx->cid_table->luma_weight;
- }
-
- UPDATE_CACHE(bs, &ctx->gb);
- GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
- if (len) {
- level = GET_CACHE(bs, &ctx->gb);
- LAST_SKIP_BITS(bs, &ctx->gb, len);
- sign = ~level >> 31;
- level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
- ctx->last_dc[component] += level;
- }
- block[0] = ctx->last_dc[component];
-
- i = 0;
-
- UPDATE_CACHE(bs, &ctx->gb);
- GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
- DNXHD_VLC_BITS, 2);
-
- while (index1 != eob_index) {
- level = ac_level[index1];
- flags = ac_flags[index1];
-
- sign = SHOW_SBITS(bs, &ctx->gb, 1);
- SKIP_BITS(bs, &ctx->gb, 1);
-
- if (flags & 1) {
- level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 7;
- SKIP_BITS(bs, &ctx->gb, index_bits);
- }
-
- if (flags & 2) {
- UPDATE_CACHE(bs, &ctx->gb);
- GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table,
- DNXHD_VLC_BITS, 2);
- i += ctx->cid_table->run[index2];
- }
-
- if (++i > 63) {
- av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
- break;
- }
-
- j = ctx->scantable.permutated[i];
- level *= scale[i];
- if (level_bias < 32 || weight_matrix[i] != level_bias)
- level += level_bias;
- level >>= level_shift;
-
- block[j] = (level^sign) - sign;
-
- UPDATE_CACHE(bs, &ctx->gb);
- GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
- DNXHD_VLC_BITS, 2);
- }
-
- CLOSE_READER(bs, &ctx->gb);
-}
-
-static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
- int n, int qscale)
-{
- dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6);
-}
-
-static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
- int n, int qscale)
-{
- dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4);
-}
-
-static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame, int x, int y)
-{
- int shift1 = ctx->bit_depth == 10;
- int dct_linesize_luma = frame->linesize[0];
- int dct_linesize_chroma = frame->linesize[1];
- uint8_t *dest_y, *dest_u, *dest_v;
- int dct_y_offset, dct_x_offset;
- int qscale, i;
-
- qscale = get_bits(&ctx->gb, 11);
- skip_bits1(&ctx->gb);
-
- if (qscale != ctx->last_qscale) {
- for (i = 0; i < 64; i++) {
- ctx->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
- ctx->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
- }
- ctx->last_qscale = qscale;
- }
-
- for (i = 0; i < 8; i++) {
- ctx->dsp.clear_block(ctx->blocks[i]);
- ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
- }
-
- if (frame->interlaced_frame) {
- dct_linesize_luma <<= 1;
- dct_linesize_chroma <<= 1;
- }
-
- dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
- dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1));
- dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1));
-
- if (ctx->cur_field) {
- dest_y += frame->linesize[0];
- dest_u += frame->linesize[1];
- dest_v += frame->linesize[2];
- }
-
- dct_y_offset = dct_linesize_luma << 3;
- dct_x_offset = 8 << shift1;
- ctx->dsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
- ctx->dsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
- ctx->dsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]);
- ctx->dsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]);
-
- if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
- dct_y_offset = dct_linesize_chroma << 3;
- ctx->dsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
- ctx->dsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]);
- ctx->dsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]);
- ctx->dsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]);
- }
-
- return 0;
-}
-
-static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame,
- const uint8_t *buf, int buf_size)
-{
- int x, y;
- for (y = 0; y < ctx->mb_height; y++) {
- ctx->last_dc[0] =
- ctx->last_dc[1] =
- ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
- init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3);
- for (x = 0; x < ctx->mb_width; x++) {
- //START_TIMER;
- dnxhd_decode_macroblock(ctx, frame, x, y);
- //STOP_TIMER("decode macroblock");
- }
- }
- return 0;
-}
-
-static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
- AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- DNXHDContext *ctx = avctx->priv_data;
- ThreadFrame frame = { .f = data };
- AVFrame *picture = data;
- int first_field = 1;
- int ret;
-
- av_dlog(avctx, "frame size %d\n", buf_size);
-
- decode_coding_unit:
- if (dnxhd_decode_header(ctx, picture, buf, buf_size, first_field) < 0)
- return -1;
-
- if ((avctx->width || avctx->height) &&
- (ctx->width != avctx->width || ctx->height != avctx->height)) {
- av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
- avctx->width, avctx->height, ctx->width, ctx->height);
- first_field = 1;
- }
-
- if (av_image_check_size(ctx->width, ctx->height, 0, avctx))
- return -1;
- avcodec_set_dimensions(avctx, ctx->width, ctx->height);
-
- if (first_field) {
- if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
- return ret;
- picture->pict_type = AV_PICTURE_TYPE_I;
- picture->key_frame = 1;
- }
-
- dnxhd_decode_macroblocks(ctx, picture, buf + 0x280, buf_size - 0x280);
-
- if (first_field && picture->interlaced_frame) {
- buf += ctx->cid_table->coding_unit_size;
- buf_size -= ctx->cid_table->coding_unit_size;
- first_field = 0;
- goto decode_coding_unit;
- }
-
- *got_frame = 1;
- return avpkt->size;
-}
-
-static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
-{
- DNXHDContext *ctx = avctx->priv_data;
-
- ff_free_vlc(&ctx->ac_vlc);
- ff_free_vlc(&ctx->dc_vlc);
- ff_free_vlc(&ctx->run_vlc);
- return 0;
-}
-
-AVCodec ff_dnxhd_decoder = {
- .name = "dnxhd",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_DNXHD,
- .priv_data_size = sizeof(DNXHDContext),
- .init = dnxhd_decode_init,
- .close = dnxhd_decode_close,
- .decode = dnxhd_decode_frame,
- .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
- .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 14:53:45 +0000