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