0,0 → 1,688 |
/* |
* Copyright (c) 2010-2011 Maxim Poliakovski |
* Copyright (c) 2010-2011 Elvis Presley |
* |
* 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 |
* Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'acpo' (Proxy), 'ap4h' (4444) |
*/ |
|
//#define DEBUG |
|
#define LONG_BITSTREAM_READER |
|
#include "avcodec.h" |
#include "get_bits.h" |
#include "internal.h" |
#include "simple_idct.h" |
#include "proresdec.h" |
#include "proresdata.h" |
|
static void permute(uint8_t *dst, const uint8_t *src, const uint8_t permutation[64]) |
{ |
int i; |
for (i = 0; i < 64; i++) |
dst[i] = permutation[src[i]]; |
} |
|
static av_cold int decode_init(AVCodecContext *avctx) |
{ |
ProresContext *ctx = avctx->priv_data; |
uint8_t idct_permutation[64]; |
|
avctx->bits_per_raw_sample = 10; |
|
ff_dsputil_init(&ctx->dsp, avctx); |
ff_proresdsp_init(&ctx->prodsp, avctx); |
|
ff_init_scantable_permutation(idct_permutation, |
ctx->prodsp.idct_permutation_type); |
|
permute(ctx->progressive_scan, ff_prores_progressive_scan, idct_permutation); |
permute(ctx->interlaced_scan, ff_prores_interlaced_scan, idct_permutation); |
|
return 0; |
} |
|
static int decode_frame_header(ProresContext *ctx, const uint8_t *buf, |
const int data_size, AVCodecContext *avctx) |
{ |
int hdr_size, width, height, flags; |
int version; |
const uint8_t *ptr; |
|
hdr_size = AV_RB16(buf); |
av_dlog(avctx, "header size %d\n", hdr_size); |
if (hdr_size > data_size) { |
av_log(avctx, AV_LOG_ERROR, "error, wrong header size\n"); |
return AVERROR_INVALIDDATA; |
} |
|
version = AV_RB16(buf + 2); |
av_dlog(avctx, "%.4s version %d\n", buf+4, version); |
if (version > 1) { |
av_log(avctx, AV_LOG_ERROR, "unsupported version: %d\n", version); |
return AVERROR_PATCHWELCOME; |
} |
|
width = AV_RB16(buf + 8); |
height = AV_RB16(buf + 10); |
if (width != avctx->width || height != avctx->height) { |
av_log(avctx, AV_LOG_ERROR, "picture resolution change: %dx%d -> %dx%d\n", |
avctx->width, avctx->height, width, height); |
return AVERROR_PATCHWELCOME; |
} |
|
ctx->frame_type = (buf[12] >> 2) & 3; |
ctx->alpha_info = buf[17] & 0xf; |
|
if (ctx->alpha_info > 2) { |
av_log(avctx, AV_LOG_ERROR, "Invalid alpha mode %d\n", ctx->alpha_info); |
return AVERROR_INVALIDDATA; |
} |
if (avctx->skip_alpha) ctx->alpha_info = 0; |
|
av_dlog(avctx, "frame type %d\n", ctx->frame_type); |
|
if (ctx->frame_type == 0) { |
ctx->scan = ctx->progressive_scan; // permuted |
} else { |
ctx->scan = ctx->interlaced_scan; // permuted |
ctx->frame->interlaced_frame = 1; |
ctx->frame->top_field_first = ctx->frame_type == 1; |
} |
|
if (ctx->alpha_info) { |
avctx->pix_fmt = (buf[12] & 0xC0) == 0xC0 ? AV_PIX_FMT_YUVA444P10 : AV_PIX_FMT_YUVA422P10; |
} else { |
avctx->pix_fmt = (buf[12] & 0xC0) == 0xC0 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV422P10; |
} |
|
ptr = buf + 20; |
flags = buf[19]; |
av_dlog(avctx, "flags %x\n", flags); |
|
if (flags & 2) { |
if(buf + data_size - ptr < 64) { |
av_log(avctx, AV_LOG_ERROR, "Header truncated\n"); |
return AVERROR_INVALIDDATA; |
} |
permute(ctx->qmat_luma, ctx->prodsp.idct_permutation, ptr); |
ptr += 64; |
} else { |
memset(ctx->qmat_luma, 4, 64); |
} |
|
if (flags & 1) { |
if(buf + data_size - ptr < 64) { |
av_log(avctx, AV_LOG_ERROR, "Header truncated\n"); |
return AVERROR_INVALIDDATA; |
} |
permute(ctx->qmat_chroma, ctx->prodsp.idct_permutation, ptr); |
} else { |
memset(ctx->qmat_chroma, 4, 64); |
} |
|
return hdr_size; |
} |
|
static int decode_picture_header(AVCodecContext *avctx, const uint8_t *buf, const int buf_size) |
{ |
ProresContext *ctx = avctx->priv_data; |
int i, hdr_size, slice_count; |
unsigned pic_data_size; |
int log2_slice_mb_width, log2_slice_mb_height; |
int slice_mb_count, mb_x, mb_y; |
const uint8_t *data_ptr, *index_ptr; |
|
hdr_size = buf[0] >> 3; |
if (hdr_size < 8 || hdr_size > buf_size) { |
av_log(avctx, AV_LOG_ERROR, "error, wrong picture header size\n"); |
return AVERROR_INVALIDDATA; |
} |
|
pic_data_size = AV_RB32(buf + 1); |
if (pic_data_size > buf_size) { |
av_log(avctx, AV_LOG_ERROR, "error, wrong picture data size\n"); |
return AVERROR_INVALIDDATA; |
} |
|
log2_slice_mb_width = buf[7] >> 4; |
log2_slice_mb_height = buf[7] & 0xF; |
if (log2_slice_mb_width > 3 || log2_slice_mb_height) { |
av_log(avctx, AV_LOG_ERROR, "unsupported slice resolution: %dx%d\n", |
1 << log2_slice_mb_width, 1 << log2_slice_mb_height); |
return AVERROR_INVALIDDATA; |
} |
|
ctx->mb_width = (avctx->width + 15) >> 4; |
if (ctx->frame_type) |
ctx->mb_height = (avctx->height + 31) >> 5; |
else |
ctx->mb_height = (avctx->height + 15) >> 4; |
|
slice_count = AV_RB16(buf + 5); |
|
if (ctx->slice_count != slice_count || !ctx->slices) { |
av_freep(&ctx->slices); |
ctx->slices = av_mallocz(slice_count * sizeof(*ctx->slices)); |
if (!ctx->slices) |
return AVERROR(ENOMEM); |
ctx->slice_count = slice_count; |
} |
|
if (!slice_count) |
return AVERROR(EINVAL); |
|
if (hdr_size + slice_count*2 > buf_size) { |
av_log(avctx, AV_LOG_ERROR, "error, wrong slice count\n"); |
return AVERROR_INVALIDDATA; |
} |
|
// parse slice information |
index_ptr = buf + hdr_size; |
data_ptr = index_ptr + slice_count*2; |
|
slice_mb_count = 1 << log2_slice_mb_width; |
mb_x = 0; |
mb_y = 0; |
|
for (i = 0; i < slice_count; i++) { |
SliceContext *slice = &ctx->slices[i]; |
|
slice->data = data_ptr; |
data_ptr += AV_RB16(index_ptr + i*2); |
|
while (ctx->mb_width - mb_x < slice_mb_count) |
slice_mb_count >>= 1; |
|
slice->mb_x = mb_x; |
slice->mb_y = mb_y; |
slice->mb_count = slice_mb_count; |
slice->data_size = data_ptr - slice->data; |
|
if (slice->data_size < 6) { |
av_log(avctx, AV_LOG_ERROR, "error, wrong slice data size\n"); |
return AVERROR_INVALIDDATA; |
} |
|
mb_x += slice_mb_count; |
if (mb_x == ctx->mb_width) { |
slice_mb_count = 1 << log2_slice_mb_width; |
mb_x = 0; |
mb_y++; |
} |
if (data_ptr > buf + buf_size) { |
av_log(avctx, AV_LOG_ERROR, "error, slice out of bounds\n"); |
return AVERROR_INVALIDDATA; |
} |
} |
|
if (mb_x || mb_y != ctx->mb_height) { |
av_log(avctx, AV_LOG_ERROR, "error wrong mb count y %d h %d\n", |
mb_y, ctx->mb_height); |
return AVERROR_INVALIDDATA; |
} |
|
return pic_data_size; |
} |
|
#define DECODE_CODEWORD(val, codebook) \ |
do { \ |
unsigned int rice_order, exp_order, switch_bits; \ |
unsigned int q, buf, bits; \ |
\ |
UPDATE_CACHE(re, gb); \ |
buf = GET_CACHE(re, gb); \ |
\ |
/* number of bits to switch between rice and exp golomb */ \ |
switch_bits = codebook & 3; \ |
rice_order = codebook >> 5; \ |
exp_order = (codebook >> 2) & 7; \ |
\ |
q = 31 - av_log2(buf); \ |
\ |
if (q > switch_bits) { /* exp golomb */ \ |
bits = exp_order - switch_bits + (q<<1); \ |
val = SHOW_UBITS(re, gb, bits) - (1 << exp_order) + \ |
((switch_bits + 1) << rice_order); \ |
SKIP_BITS(re, gb, bits); \ |
} else if (rice_order) { \ |
SKIP_BITS(re, gb, q+1); \ |
val = (q << rice_order) + SHOW_UBITS(re, gb, rice_order); \ |
SKIP_BITS(re, gb, rice_order); \ |
} else { \ |
val = q; \ |
SKIP_BITS(re, gb, q+1); \ |
} \ |
} while (0) |
|
#define TOSIGNED(x) (((x) >> 1) ^ (-((x) & 1))) |
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#define FIRST_DC_CB 0xB8 |
|
static const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70}; |
|
static av_always_inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out, |
int blocks_per_slice) |
{ |
int16_t prev_dc; |
int code, i, sign; |
|
OPEN_READER(re, gb); |
|
DECODE_CODEWORD(code, FIRST_DC_CB); |
prev_dc = TOSIGNED(code); |
out[0] = prev_dc; |
|
out += 64; // dc coeff for the next block |
|
code = 5; |
sign = 0; |
for (i = 1; i < blocks_per_slice; i++, out += 64) { |
DECODE_CODEWORD(code, dc_codebook[FFMIN(code, 6U)]); |
if(code) sign ^= -(code & 1); |
else sign = 0; |
prev_dc += (((code + 1) >> 1) ^ sign) - sign; |
out[0] = prev_dc; |
} |
CLOSE_READER(re, gb); |
} |
|
// adaptive codebook switching lut according to previous run/level values |
static const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C }; |
static const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C }; |
|
static av_always_inline int decode_ac_coeffs(AVCodecContext *avctx, GetBitContext *gb, |
int16_t *out, int blocks_per_slice) |
{ |
ProresContext *ctx = avctx->priv_data; |
int block_mask, sign; |
unsigned pos, run, level; |
int max_coeffs, i, bits_left; |
int log2_block_count = av_log2(blocks_per_slice); |
|
OPEN_READER(re, gb); |
UPDATE_CACHE(re, gb); \ |
run = 4; |
level = 2; |
|
max_coeffs = 64 << log2_block_count; |
block_mask = blocks_per_slice - 1; |
|
for (pos = block_mask;;) { |
bits_left = gb->size_in_bits - re_index; |
if (!bits_left || (bits_left < 32 && !SHOW_UBITS(re, gb, bits_left))) |
break; |
|
DECODE_CODEWORD(run, run_to_cb[FFMIN(run, 15)]); |
pos += run + 1; |
if (pos >= max_coeffs) { |
av_log(avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", pos, max_coeffs); |
return AVERROR_INVALIDDATA; |
} |
|
DECODE_CODEWORD(level, lev_to_cb[FFMIN(level, 9)]); |
level += 1; |
|
i = pos >> log2_block_count; |
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sign = SHOW_SBITS(re, gb, 1); |
SKIP_BITS(re, gb, 1); |
out[((pos & block_mask) << 6) + ctx->scan[i]] = ((level ^ sign) - sign); |
} |
|
CLOSE_READER(re, gb); |
return 0; |
} |
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static int decode_slice_luma(AVCodecContext *avctx, SliceContext *slice, |
uint16_t *dst, int dst_stride, |
const uint8_t *buf, unsigned buf_size, |
const int16_t *qmat) |
{ |
ProresContext *ctx = avctx->priv_data; |
LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]); |
int16_t *block; |
GetBitContext gb; |
int i, blocks_per_slice = slice->mb_count<<2; |
int ret; |
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for (i = 0; i < blocks_per_slice; i++) |
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); |
if ((ret = decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice)) < 0) |
return ret; |
|
block = blocks; |
for (i = 0; i < slice->mb_count; i++) { |
ctx->prodsp.idct_put(dst, dst_stride, block+(0<<6), qmat); |
ctx->prodsp.idct_put(dst +8, dst_stride, block+(1<<6), qmat); |
ctx->prodsp.idct_put(dst+4*dst_stride , dst_stride, block+(2<<6), qmat); |
ctx->prodsp.idct_put(dst+4*dst_stride+8, dst_stride, block+(3<<6), qmat); |
block += 4*64; |
dst += 16; |
} |
return 0; |
} |
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static int decode_slice_chroma(AVCodecContext *avctx, SliceContext *slice, |
uint16_t *dst, int dst_stride, |
const uint8_t *buf, unsigned buf_size, |
const int16_t *qmat, int log2_blocks_per_mb) |
{ |
ProresContext *ctx = avctx->priv_data; |
LOCAL_ALIGNED_16(int16_t, blocks, [8*4*64]); |
int16_t *block; |
GetBitContext gb; |
int i, j, blocks_per_slice = slice->mb_count << log2_blocks_per_mb; |
int ret; |
|
for (i = 0; i < blocks_per_slice; i++) |
ctx->dsp.clear_block(blocks+(i<<6)); |
|
init_get_bits(&gb, buf, buf_size << 3); |
|
decode_dc_coeffs(&gb, blocks, blocks_per_slice); |
if ((ret = decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice)) < 0) |
return ret; |
|
block = blocks; |
for (i = 0; i < slice->mb_count; i++) { |
for (j = 0; j < log2_blocks_per_mb; j++) { |
ctx->prodsp.idct_put(dst, dst_stride, block+(0<<6), qmat); |
ctx->prodsp.idct_put(dst+4*dst_stride, dst_stride, block+(1<<6), qmat); |
block += 2*64; |
dst += 8; |
} |
} |
return 0; |
} |
|
static void unpack_alpha(GetBitContext *gb, uint16_t *dst, int num_coeffs, |
const int num_bits) |
{ |
const int mask = (1 << num_bits) - 1; |
int i, idx, val, alpha_val; |
|
idx = 0; |
alpha_val = mask; |
do { |
do { |
if (get_bits1(gb)) { |
val = get_bits(gb, num_bits); |
} else { |
int sign; |
val = get_bits(gb, num_bits == 16 ? 7 : 4); |
sign = val & 1; |
val = (val + 2) >> 1; |
if (sign) |
val = -val; |
} |
alpha_val = (alpha_val + val) & mask; |
if (num_bits == 16) { |
dst[idx++] = alpha_val >> 6; |
} else { |
dst[idx++] = (alpha_val << 2) | (alpha_val >> 6); |
} |
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; |
int ret; |
|
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]; |
} |
|
ret = decode_slice_luma(avctx, slice, (uint16_t*)dest_y, luma_stride, |
buf, y_data_size, qmat_luma_scaled); |
if (ret < 0) |
return ret; |
|
if (!(avctx->flags & CODEC_FLAG_GRAY)) { |
ret = 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); |
if (ret < 0) |
return ret; |
|
ret = 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); |
if (ret < 0) |
return ret; |
} |
/* 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", |
.long_name = NULL_IF_CONFIG_SMALL("ProRes"), |
.type = AVMEDIA_TYPE_VIDEO, |
.id = AV_CODEC_ID_PRORES, |
.priv_data_size = sizeof(ProresContext), |
.init = decode_init, |
.close = decode_close, |
.decode = decode_frame, |
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, |
}; |