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-rw-r--r--libavcodec/proresdec2.c688
1 files changed, 688 insertions, 0 deletions
diff --git a/libavcodec/proresdec2.c b/libavcodec/proresdec2.c
new file mode 100644
index 0000000000..b1affadaac
--- /dev/null
+++ b/libavcodec/proresdec2.c
@@ -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)))
+
+#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;
+
+ 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;
+}
+
+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;
+
+ 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++) {
+ 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;
+}
+
+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,
+};