694 lines
22 KiB
C
694 lines
22 KiB
C
/*
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* Copyright (c) 2010-2011 Maxim Poliakovski
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* Copyright (c) 2010-2011 Elvis Presley
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy), 'ap4h' (4444)
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*/
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//#define DEBUG
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#define LONG_BITSTREAM_READER
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#include "avcodec.h"
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#include "get_bits.h"
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#include "internal.h"
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#include "simple_idct.h"
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#include "proresdec.h"
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static void permute(uint8_t *dst, const uint8_t *src, const uint8_t permutation[64])
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{
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int i;
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for (i = 0; i < 64; i++)
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dst[i] = permutation[src[i]];
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}
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static const uint8_t progressive_scan[64] = {
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0, 1, 8, 9, 2, 3, 10, 11,
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16, 17, 24, 25, 18, 19, 26, 27,
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4, 5, 12, 20, 13, 6, 7, 14,
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21, 28, 29, 22, 15, 23, 30, 31,
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32, 33, 40, 48, 41, 34, 35, 42,
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49, 56, 57, 50, 43, 36, 37, 44,
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51, 58, 59, 52, 45, 38, 39, 46,
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53, 60, 61, 54, 47, 55, 62, 63
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};
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static const uint8_t interlaced_scan[64] = {
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0, 8, 1, 9, 16, 24, 17, 25,
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2, 10, 3, 11, 18, 26, 19, 27,
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32, 40, 33, 34, 41, 48, 56, 49,
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42, 35, 43, 50, 57, 58, 51, 59,
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4, 12, 5, 6, 13, 20, 28, 21,
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14, 7, 15, 22, 29, 36, 44, 37,
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30, 23, 31, 38, 45, 52, 60, 53,
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46, 39, 47, 54, 61, 62, 55, 63,
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};
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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ProresContext *ctx = avctx->priv_data;
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uint8_t idct_permutation[64];
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avctx->bits_per_raw_sample = 10;
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ff_dsputil_init(&ctx->dsp, avctx);
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ff_proresdsp_init(&ctx->prodsp, avctx);
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ff_init_scantable_permutation(idct_permutation,
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ctx->prodsp.idct_permutation_type);
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permute(ctx->progressive_scan, progressive_scan, idct_permutation);
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permute(ctx->interlaced_scan, interlaced_scan, idct_permutation);
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return 0;
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}
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static int decode_frame_header(ProresContext *ctx, const uint8_t *buf,
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const int data_size, AVCodecContext *avctx)
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{
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int hdr_size, width, height, flags;
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int version;
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const uint8_t *ptr;
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hdr_size = AV_RB16(buf);
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av_dlog(avctx, "header size %d\n", hdr_size);
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if (hdr_size > data_size) {
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av_log(avctx, AV_LOG_ERROR, "error, wrong header size\n");
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return AVERROR_INVALIDDATA;
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}
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version = AV_RB16(buf + 2);
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av_dlog(avctx, "%.4s version %d\n", buf+4, version);
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if (version > 1) {
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av_log(avctx, AV_LOG_ERROR, "unsupported version: %d\n", version);
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return AVERROR_PATCHWELCOME;
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}
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width = AV_RB16(buf + 8);
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height = AV_RB16(buf + 10);
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if (width != avctx->width || height != avctx->height) {
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av_log(avctx, AV_LOG_ERROR, "picture resolution change: %dx%d -> %dx%d\n",
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avctx->width, avctx->height, width, height);
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return AVERROR_PATCHWELCOME;
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}
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ctx->frame_type = (buf[12] >> 2) & 3;
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ctx->alpha_info = buf[17] & 0xf;
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if (ctx->alpha_info > 2) {
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av_log(avctx, AV_LOG_ERROR, "Invalid alpha mode %d\n", ctx->alpha_info);
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return AVERROR_INVALIDDATA;
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}
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av_dlog(avctx, "frame type %d\n", ctx->frame_type);
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if (ctx->frame_type == 0) {
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ctx->scan = ctx->progressive_scan; // permuted
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} else {
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ctx->scan = ctx->interlaced_scan; // permuted
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ctx->frame->interlaced_frame = 1;
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ctx->frame->top_field_first = ctx->frame_type == 1;
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}
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if (ctx->alpha_info) {
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avctx->pix_fmt = (buf[12] & 0xC0) == 0xC0 ? AV_PIX_FMT_YUVA444P10 : AV_PIX_FMT_YUVA422P10;
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} else {
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avctx->pix_fmt = (buf[12] & 0xC0) == 0xC0 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV422P10;
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}
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ptr = buf + 20;
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flags = buf[19];
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av_dlog(avctx, "flags %x\n", flags);
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if (flags & 2) {
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if(buf + data_size - ptr < 64) {
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av_log(avctx, AV_LOG_ERROR, "Header truncated\n");
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return AVERROR_INVALIDDATA;
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}
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permute(ctx->qmat_luma, ctx->prodsp.idct_permutation, ptr);
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ptr += 64;
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} else {
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memset(ctx->qmat_luma, 4, 64);
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}
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if (flags & 1) {
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if(buf + data_size - ptr < 64) {
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av_log(avctx, AV_LOG_ERROR, "Header truncated\n");
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return AVERROR_INVALIDDATA;
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}
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permute(ctx->qmat_chroma, ctx->prodsp.idct_permutation, ptr);
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} else {
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memset(ctx->qmat_chroma, 4, 64);
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}
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return hdr_size;
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}
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static int decode_picture_header(AVCodecContext *avctx, const uint8_t *buf, const int buf_size)
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{
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ProresContext *ctx = avctx->priv_data;
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int i, hdr_size, slice_count;
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unsigned pic_data_size;
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int log2_slice_mb_width, log2_slice_mb_height;
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int slice_mb_count, mb_x, mb_y;
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const uint8_t *data_ptr, *index_ptr;
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hdr_size = buf[0] >> 3;
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if (hdr_size < 8 || hdr_size > buf_size) {
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av_log(avctx, AV_LOG_ERROR, "error, wrong picture header size\n");
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return AVERROR_INVALIDDATA;
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}
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pic_data_size = AV_RB32(buf + 1);
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if (pic_data_size > buf_size) {
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av_log(avctx, AV_LOG_ERROR, "error, wrong picture data size\n");
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return AVERROR_INVALIDDATA;
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}
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log2_slice_mb_width = buf[7] >> 4;
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log2_slice_mb_height = buf[7] & 0xF;
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if (log2_slice_mb_width > 3 || log2_slice_mb_height) {
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av_log(avctx, AV_LOG_ERROR, "unsupported slice resolution: %dx%d\n",
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1 << log2_slice_mb_width, 1 << log2_slice_mb_height);
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return AVERROR_INVALIDDATA;
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}
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ctx->mb_width = (avctx->width + 15) >> 4;
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if (ctx->frame_type)
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ctx->mb_height = (avctx->height + 31) >> 5;
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else
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ctx->mb_height = (avctx->height + 15) >> 4;
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slice_count = AV_RB16(buf + 5);
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if (ctx->slice_count != slice_count || !ctx->slices) {
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av_freep(&ctx->slices);
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ctx->slices = av_mallocz(slice_count * sizeof(*ctx->slices));
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if (!ctx->slices)
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return AVERROR(ENOMEM);
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ctx->slice_count = slice_count;
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}
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if (!slice_count)
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return AVERROR(EINVAL);
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if (hdr_size + slice_count*2 > buf_size) {
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av_log(avctx, AV_LOG_ERROR, "error, wrong slice count\n");
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return AVERROR_INVALIDDATA;
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}
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// parse slice information
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index_ptr = buf + hdr_size;
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data_ptr = index_ptr + slice_count*2;
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slice_mb_count = 1 << log2_slice_mb_width;
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mb_x = 0;
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mb_y = 0;
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for (i = 0; i < slice_count; i++) {
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SliceContext *slice = &ctx->slices[i];
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slice->data = data_ptr;
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data_ptr += AV_RB16(index_ptr + i*2);
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while (ctx->mb_width - mb_x < slice_mb_count)
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slice_mb_count >>= 1;
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slice->mb_x = mb_x;
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slice->mb_y = mb_y;
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slice->mb_count = slice_mb_count;
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slice->data_size = data_ptr - slice->data;
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if (slice->data_size < 6) {
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av_log(avctx, AV_LOG_ERROR, "error, wrong slice data size\n");
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return AVERROR_INVALIDDATA;
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}
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mb_x += slice_mb_count;
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if (mb_x == ctx->mb_width) {
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slice_mb_count = 1 << log2_slice_mb_width;
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mb_x = 0;
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mb_y++;
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}
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if (data_ptr > buf + buf_size) {
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av_log(avctx, AV_LOG_ERROR, "error, slice out of bounds\n");
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return AVERROR_INVALIDDATA;
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}
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}
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if (mb_x || mb_y != ctx->mb_height) {
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av_log(avctx, AV_LOG_ERROR, "error wrong mb count y %d h %d\n",
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mb_y, ctx->mb_height);
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return AVERROR_INVALIDDATA;
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}
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return pic_data_size;
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}
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#define DECODE_CODEWORD(val, codebook) \
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do { \
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unsigned int rice_order, exp_order, switch_bits; \
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unsigned int q, buf, bits; \
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\
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UPDATE_CACHE(re, gb); \
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buf = GET_CACHE(re, gb); \
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\
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/* number of bits to switch between rice and exp golomb */ \
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switch_bits = codebook & 3; \
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rice_order = codebook >> 5; \
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exp_order = (codebook >> 2) & 7; \
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\
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q = 31 - av_log2(buf); \
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\
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if (q > switch_bits) { /* exp golomb */ \
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bits = exp_order - switch_bits + (q<<1); \
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val = SHOW_UBITS(re, gb, bits) - (1 << exp_order) + \
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((switch_bits + 1) << rice_order); \
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SKIP_BITS(re, gb, bits); \
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} else if (rice_order) { \
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SKIP_BITS(re, gb, q+1); \
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val = (q << rice_order) + SHOW_UBITS(re, gb, rice_order); \
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SKIP_BITS(re, gb, rice_order); \
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} else { \
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val = q; \
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SKIP_BITS(re, gb, q+1); \
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} \
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} while (0)
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#define TOSIGNED(x) (((x) >> 1) ^ (-((x) & 1)))
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#define FIRST_DC_CB 0xB8
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static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70};
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static av_always_inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out,
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int blocks_per_slice)
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{
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int16_t prev_dc;
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int code, i, sign;
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OPEN_READER(re, gb);
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DECODE_CODEWORD(code, FIRST_DC_CB);
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prev_dc = TOSIGNED(code);
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out[0] = prev_dc;
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out += 64; // dc coeff for the next block
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code = 5;
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sign = 0;
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for (i = 1; i < blocks_per_slice; i++, out += 64) {
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DECODE_CODEWORD(code, dc_codebook[FFMIN(code, 6U)]);
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if(code) sign ^= -(code & 1);
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else sign = 0;
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prev_dc += (((code + 1) >> 1) ^ sign) - sign;
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out[0] = prev_dc;
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}
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CLOSE_READER(re, gb);
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}
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// adaptive codebook switching lut according to previous run/level values
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static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C };
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static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C };
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static av_always_inline void decode_ac_coeffs(AVCodecContext *avctx, GetBitContext *gb,
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int16_t *out, int blocks_per_slice)
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{
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ProresContext *ctx = avctx->priv_data;
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int block_mask, sign;
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unsigned pos, run, level;
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int max_coeffs, i, bits_left;
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int log2_block_count = av_log2(blocks_per_slice);
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OPEN_READER(re, gb);
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UPDATE_CACHE(re, gb); \
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run = 4;
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level = 2;
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max_coeffs = 64 << log2_block_count;
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block_mask = blocks_per_slice - 1;
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for (pos = block_mask;;) {
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bits_left = gb->size_in_bits - re_index;
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if (!bits_left || (bits_left < 32 && !SHOW_UBITS(re, gb, bits_left)))
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break;
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DECODE_CODEWORD(run, run_to_cb[FFMIN(run, 15)]);
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pos += run + 1;
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if (pos >= max_coeffs) {
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av_log(avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", pos, max_coeffs);
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return;
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}
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DECODE_CODEWORD(level, lev_to_cb[FFMIN(level, 9)]);
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level += 1;
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i = pos >> log2_block_count;
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sign = SHOW_SBITS(re, gb, 1);
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SKIP_BITS(re, gb, 1);
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out[((pos & block_mask) << 6) + ctx->scan[i]] = ((level ^ sign) - sign);
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}
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CLOSE_READER(re, gb);
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}
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static void decode_slice_luma(AVCodecContext *avctx, SliceContext *slice,
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uint16_t *dst, int dst_stride,
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const uint8_t *buf, unsigned buf_size,
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const int16_t *qmat)
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{
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ProresContext *ctx = avctx->priv_data;
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LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]);
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int16_t *block;
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GetBitContext gb;
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int i, blocks_per_slice = slice->mb_count<<2;
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for (i = 0; i < blocks_per_slice; i++)
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ctx->dsp.clear_block(blocks+(i<<6));
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init_get_bits(&gb, buf, buf_size << 3);
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decode_dc_coeffs(&gb, blocks, blocks_per_slice);
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decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice);
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block = blocks;
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for (i = 0; i < slice->mb_count; i++) {
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ctx->prodsp.idct_put(dst, dst_stride, block+(0<<6), qmat);
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ctx->prodsp.idct_put(dst +8, dst_stride, block+(1<<6), qmat);
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ctx->prodsp.idct_put(dst+4*dst_stride , dst_stride, block+(2<<6), qmat);
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ctx->prodsp.idct_put(dst+4*dst_stride+8, dst_stride, block+(3<<6), qmat);
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block += 4*64;
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dst += 16;
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}
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}
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static void decode_slice_chroma(AVCodecContext *avctx, SliceContext *slice,
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uint16_t *dst, int dst_stride,
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const uint8_t *buf, unsigned buf_size,
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const int16_t *qmat, int log2_blocks_per_mb)
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{
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ProresContext *ctx = avctx->priv_data;
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LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]);
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int16_t *block;
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GetBitContext gb;
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int i, j, blocks_per_slice = slice->mb_count << log2_blocks_per_mb;
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for (i = 0; i < blocks_per_slice; i++)
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ctx->dsp.clear_block(blocks+(i<<6));
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init_get_bits(&gb, buf, buf_size << 3);
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decode_dc_coeffs(&gb, blocks, blocks_per_slice);
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decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice);
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block = blocks;
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for (i = 0; i < slice->mb_count; i++) {
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for (j = 0; j < log2_blocks_per_mb; j++) {
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ctx->prodsp.idct_put(dst, dst_stride, block+(0<<6), qmat);
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ctx->prodsp.idct_put(dst+4*dst_stride, dst_stride, block+(1<<6), qmat);
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block += 2*64;
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dst += 8;
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}
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}
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}
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static void unpack_alpha(GetBitContext *gb, uint16_t *dst, int num_coeffs,
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const int num_bits)
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{
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const int mask = (1 << num_bits) - 1;
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int i, idx, val, alpha_val;
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idx = 0;
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alpha_val = mask;
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do {
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do {
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if (get_bits1(gb)) {
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val = get_bits(gb, num_bits);
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} else {
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int sign;
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val = get_bits(gb, num_bits == 16 ? 7 : 4);
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sign = val & 1;
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val = (val + 2) >> 1;
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if (sign)
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val = -val;
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}
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alpha_val = (alpha_val + val) & mask;
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if (num_bits == 16) {
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dst[idx++] = alpha_val >> 6;
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} else {
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dst[idx++] = (alpha_val << 2) | (alpha_val >> 6);
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}
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if (idx >= num_coeffs)
|
|
break;
|
|
} while (get_bits_left(gb)>0 && get_bits1(gb));
|
|
val = get_bits(gb, 4);
|
|
if (!val)
|
|
val = get_bits(gb, 11);
|
|
if (idx + val > num_coeffs)
|
|
val = num_coeffs - idx;
|
|
if (num_bits == 16) {
|
|
for (i = 0; i < val; i++)
|
|
dst[idx++] = alpha_val >> 6;
|
|
} else {
|
|
for (i = 0; i < val; i++)
|
|
dst[idx++] = (alpha_val << 2) | (alpha_val >> 6);
|
|
|
|
}
|
|
} while (idx < num_coeffs);
|
|
}
|
|
|
|
/**
|
|
* Decode alpha slice plane.
|
|
*/
|
|
static void decode_slice_alpha(ProresContext *ctx,
|
|
uint16_t *dst, int dst_stride,
|
|
const uint8_t *buf, int buf_size,
|
|
int blocks_per_slice)
|
|
{
|
|
GetBitContext gb;
|
|
int i;
|
|
LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]);
|
|
int16_t *block;
|
|
|
|
for (i = 0; i < blocks_per_slice<<2; i++)
|
|
ctx->dsp.clear_block(blocks+(i<<6));
|
|
|
|
init_get_bits(&gb, buf, buf_size << 3);
|
|
|
|
if (ctx->alpha_info == 2) {
|
|
unpack_alpha(&gb, blocks, blocks_per_slice * 4 * 64, 16);
|
|
} else {
|
|
unpack_alpha(&gb, blocks, blocks_per_slice * 4 * 64, 8);
|
|
}
|
|
|
|
block = blocks;
|
|
for (i = 0; i < 16; i++) {
|
|
memcpy(dst, block, 16 * blocks_per_slice * sizeof(*dst));
|
|
dst += dst_stride >> 1;
|
|
block += 16 * blocks_per_slice;
|
|
}
|
|
}
|
|
|
|
static int decode_slice_thread(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
|
|
{
|
|
ProresContext *ctx = avctx->priv_data;
|
|
SliceContext *slice = &ctx->slices[jobnr];
|
|
const uint8_t *buf = slice->data;
|
|
AVFrame *pic = ctx->frame;
|
|
int i, hdr_size, qscale, log2_chroma_blocks_per_mb;
|
|
int luma_stride, chroma_stride;
|
|
int y_data_size, u_data_size, v_data_size, a_data_size;
|
|
uint8_t *dest_y, *dest_u, *dest_v, *dest_a;
|
|
int16_t qmat_luma_scaled[64];
|
|
int16_t qmat_chroma_scaled[64];
|
|
int mb_x_shift;
|
|
|
|
slice->ret = -1;
|
|
//av_log(avctx, AV_LOG_INFO, "slice %d mb width %d mb x %d y %d\n",
|
|
// jobnr, slice->mb_count, slice->mb_x, slice->mb_y);
|
|
|
|
// slice header
|
|
hdr_size = buf[0] >> 3;
|
|
qscale = av_clip(buf[1], 1, 224);
|
|
qscale = qscale > 128 ? qscale - 96 << 2: qscale;
|
|
y_data_size = AV_RB16(buf + 2);
|
|
u_data_size = AV_RB16(buf + 4);
|
|
v_data_size = slice->data_size - y_data_size - u_data_size - hdr_size;
|
|
if (hdr_size > 7) v_data_size = AV_RB16(buf + 6);
|
|
a_data_size = slice->data_size - y_data_size - u_data_size -
|
|
v_data_size - hdr_size;
|
|
|
|
if (y_data_size < 0 || u_data_size < 0 || v_data_size < 0
|
|
|| hdr_size+y_data_size+u_data_size+v_data_size > slice->data_size){
|
|
av_log(avctx, AV_LOG_ERROR, "invalid plane data size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
buf += hdr_size;
|
|
|
|
for (i = 0; i < 64; i++) {
|
|
qmat_luma_scaled [i] = ctx->qmat_luma [i] * qscale;
|
|
qmat_chroma_scaled[i] = ctx->qmat_chroma[i] * qscale;
|
|
}
|
|
|
|
if (ctx->frame_type == 0) {
|
|
luma_stride = pic->linesize[0];
|
|
chroma_stride = pic->linesize[1];
|
|
} else {
|
|
luma_stride = pic->linesize[0] << 1;
|
|
chroma_stride = pic->linesize[1] << 1;
|
|
}
|
|
|
|
if (avctx->pix_fmt == AV_PIX_FMT_YUV444P10 || avctx->pix_fmt == AV_PIX_FMT_YUVA444P10) {
|
|
mb_x_shift = 5;
|
|
log2_chroma_blocks_per_mb = 2;
|
|
} else {
|
|
mb_x_shift = 4;
|
|
log2_chroma_blocks_per_mb = 1;
|
|
}
|
|
|
|
dest_y = pic->data[0] + (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
|
|
dest_u = pic->data[1] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << mb_x_shift);
|
|
dest_v = pic->data[2] + (slice->mb_y << 4) * chroma_stride + (slice->mb_x << mb_x_shift);
|
|
dest_a = pic->data[3] + (slice->mb_y << 4) * luma_stride + (slice->mb_x << 5);
|
|
|
|
if (ctx->frame_type && ctx->first_field ^ ctx->frame->top_field_first) {
|
|
dest_y += pic->linesize[0];
|
|
dest_u += pic->linesize[1];
|
|
dest_v += pic->linesize[2];
|
|
dest_a += pic->linesize[3];
|
|
}
|
|
|
|
decode_slice_luma(avctx, slice, (uint16_t*)dest_y, luma_stride,
|
|
buf, y_data_size, qmat_luma_scaled);
|
|
|
|
if (!(avctx->flags & CODEC_FLAG_GRAY)) {
|
|
decode_slice_chroma(avctx, slice, (uint16_t*)dest_u, chroma_stride,
|
|
buf + y_data_size, u_data_size,
|
|
qmat_chroma_scaled, log2_chroma_blocks_per_mb);
|
|
decode_slice_chroma(avctx, slice, (uint16_t*)dest_v, chroma_stride,
|
|
buf + y_data_size + u_data_size, v_data_size,
|
|
qmat_chroma_scaled, log2_chroma_blocks_per_mb);
|
|
}
|
|
/* decode alpha plane if available */
|
|
if (ctx->alpha_info && pic->data[3] && a_data_size)
|
|
decode_slice_alpha(ctx, (uint16_t*)dest_a, luma_stride,
|
|
buf + y_data_size + u_data_size + v_data_size,
|
|
a_data_size, slice->mb_count);
|
|
|
|
slice->ret = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int decode_picture(AVCodecContext *avctx)
|
|
{
|
|
ProresContext *ctx = avctx->priv_data;
|
|
int i;
|
|
|
|
avctx->execute2(avctx, decode_slice_thread, NULL, NULL, ctx->slice_count);
|
|
|
|
for (i = 0; i < ctx->slice_count; i++)
|
|
if (ctx->slices[i].ret < 0)
|
|
return ctx->slices[i].ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
|
|
AVPacket *avpkt)
|
|
{
|
|
ProresContext *ctx = avctx->priv_data;
|
|
AVFrame *frame = data;
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
int frame_hdr_size, pic_size, ret;
|
|
|
|
if (buf_size < 28 || AV_RL32(buf + 4) != AV_RL32("icpf")) {
|
|
av_log(avctx, AV_LOG_ERROR, "invalid frame header\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ctx->frame = frame;
|
|
ctx->frame->pict_type = AV_PICTURE_TYPE_I;
|
|
ctx->frame->key_frame = 1;
|
|
ctx->first_field = 1;
|
|
|
|
buf += 8;
|
|
buf_size -= 8;
|
|
|
|
frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx);
|
|
if (frame_hdr_size < 0)
|
|
return frame_hdr_size;
|
|
|
|
buf += frame_hdr_size;
|
|
buf_size -= frame_hdr_size;
|
|
|
|
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
|
|
return ret;
|
|
|
|
decode_picture:
|
|
pic_size = decode_picture_header(avctx, buf, buf_size);
|
|
if (pic_size < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "error decoding picture header\n");
|
|
return pic_size;
|
|
}
|
|
|
|
if ((ret = decode_picture(avctx)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "error decoding picture\n");
|
|
return ret;
|
|
}
|
|
|
|
buf += pic_size;
|
|
buf_size -= pic_size;
|
|
|
|
if (ctx->frame_type && buf_size > 0 && ctx->first_field) {
|
|
ctx->first_field = 0;
|
|
goto decode_picture;
|
|
}
|
|
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static av_cold int decode_close(AVCodecContext *avctx)
|
|
{
|
|
ProresContext *ctx = avctx->priv_data;
|
|
|
|
av_freep(&ctx->slices);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_prores_decoder = {
|
|
.name = "prores",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_PRORES,
|
|
.priv_data_size = sizeof(ProresContext),
|
|
.init = decode_init,
|
|
.close = decode_close,
|
|
.decode = decode_frame,
|
|
.long_name = NULL_IF_CONFIG_SMALL("ProRes"),
|
|
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
|
|
};
|