From be64629a135642f20325e1422352707bb81d5c91 Mon Sep 17 00:00:00 2001 From: Maxim Poliakovski Date: Wed, 21 Sep 2011 13:09:32 +0200 Subject: Apple ProRes decoder MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Martin Storsjö --- libavcodec/proresdec.c | 733 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 733 insertions(+) create mode 100644 libavcodec/proresdec.c (limited to 'libavcodec/proresdec.c') diff --git a/libavcodec/proresdec.c b/libavcodec/proresdec.c new file mode 100644 index 0000000..0570898 --- /dev/null +++ b/libavcodec/proresdec.c @@ -0,0 +1,733 @@ +/* + * Apple ProRes compatible decoder + * + * Copyright (c) 2010-2011 Maxim Poliakovski + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * This is a decoder for Apple ProRes 422 SD/HQ/LT/Proxy and ProRes 4444. + * It is used for storing and editing high definition video data in Apple's Final Cut Pro. + * + * @see http://wiki.multimedia.cx/index.php?title=Apple_ProRes + */ + +#define A32_BITSTREAM_READER // some ProRes vlc codes require up to 28 bits to be read at once + +#include + +#include "libavutil/intmath.h" +#include "avcodec.h" +#include "dsputil.h" +#include "get_bits.h" + +#define BITS_PER_SAMPLE 10 ///< output precision of that decoder +#define BIAS (1 << (BITS_PER_SAMPLE - 1)) ///< bias value for converting signed pixels into unsigned ones +#define CLIP_MIN (1 << (BITS_PER_SAMPLE - 8)) ///< minimum value for clipping resulting pixels +#define CLIP_MAX (1 << BITS_PER_SAMPLE) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels + + +typedef struct { + DSPContext dsp; + AVFrame picture; + ScanTable scantable; + int scantable_type; ///< -1 = uninitialized, 0 = progressive, 1/2 = interlaced + + int frame_type; ///< 0 = progressive, 1 = top-field first, 2 = bottom-field first + int pic_format; ///< 2 = 422, 3 = 444 + uint8_t qmat_luma[64]; ///< dequantization matrix for luma + uint8_t qmat_chroma[64]; ///< dequantization matrix for chroma + int qmat_changed; ///< 1 - global quantization matrices changed + int prev_slice_sf; ///< scalefactor of the previous decoded slice + DECLARE_ALIGNED(16, int16_t, qmat_luma_scaled[64]); + DECLARE_ALIGNED(16, int16_t, qmat_chroma_scaled[64]); + DECLARE_ALIGNED(16, DCTELEM, blocks[8 * 4 * 64]); + int total_slices; ///< total number of slices in a picture + const uint8_t **slice_data_index; ///< array of pointers to the data of each slice + int chroma_factor; + int mb_chroma_factor; + int num_chroma_blocks; ///< number of chrominance blocks in a macroblock + int num_x_slices; + int num_y_slices; + int slice_width_factor; + int slice_height_factor; + int num_x_mbs; + int num_y_mbs; +} ProresContext; + + +static const uint8_t progressive_scan[64] = { + 0, 1, 8, 9, 2, 3, 10, 11, + 16, 17, 24, 25, 18, 19, 26, 27, + 4, 5, 12, 20, 13, 6, 7, 14, + 21, 28, 29, 22, 15, 23, 30, 31, + 32, 33, 40, 48, 41, 34, 35, 42, + 49, 56, 57, 50, 43, 36, 37, 44, + 51, 58, 59, 52, 45, 38, 39, 46, + 53, 60, 61, 54, 47, 55, 62, 63 +}; + +static const uint8_t interlaced_scan[64] = { + 0, 8, 1, 9, 16, 24, 17, 25, + 2, 10, 3, 11, 18, 26, 19, 27, + 32, 40, 33, 34, 41, 48, 56, 49, + 42, 35, 43, 50, 57, 58, 51, 59, + 4, 12, 5, 6, 13, 20, 28, 21, + 14, 7, 15, 22, 29, 36, 44, 37, + 30, 23, 31, 38, 45, 52, 60, 53, + 46, 39, 47, 54, 61, 62, 55, 63 +}; + + +static av_cold int decode_init(AVCodecContext *avctx) +{ + ProresContext *ctx = avctx->priv_data; + + ctx->total_slices = 0; + ctx->slice_data_index = 0; + + avctx->pix_fmt = PIX_FMT_YUV422P10; // set default pixel format + + avctx->bits_per_raw_sample = BITS_PER_SAMPLE; + dsputil_init(&ctx->dsp, avctx); + + avctx->coded_frame = &ctx->picture; + avcodec_get_frame_defaults(&ctx->picture); + ctx->picture.type = AV_PICTURE_TYPE_I; + ctx->picture.key_frame = 1; + + ctx->scantable_type = -1; // set scantable type to uninitialized + memset(ctx->qmat_luma, 4, 64); + memset(ctx->qmat_chroma, 4, 64); + ctx->prev_slice_sf = 0; + + return 0; +} + + +static int decode_frame_header(ProresContext *ctx, const uint8_t *buf, + const int data_size, AVCodecContext *avctx) +{ + int hdr_size, version, width, height, flags; + const uint8_t *ptr; + + hdr_size = AV_RB16(buf); + if (hdr_size > data_size) { + av_log(avctx, AV_LOG_ERROR, "frame data too short!\n"); + return -1; + } + + version = AV_RB16(buf + 2); + if (version >= 2) { + av_log(avctx, AV_LOG_ERROR, + "unsupported header version: %d\n", version); + return -1; + } + + width = AV_RB16(buf + 8); + height = AV_RB16(buf + 10); + if (width != avctx->width || height != avctx->height) { + av_log(avctx, AV_LOG_ERROR, + "picture dimension changed! Old: %d x %d, new: %d x %d\n", + avctx->width, avctx->height, width, height); + return -1; + } + + ctx->frame_type = (buf[12] >> 2) & 3; + if (ctx->frame_type > 2) { + av_log(avctx, AV_LOG_ERROR, + "unsupported frame type: %d!\n", ctx->frame_type); + return -1; + } + + ctx->chroma_factor = (buf[12] >> 6) & 3; + ctx->mb_chroma_factor = ctx->chroma_factor + 2; + ctx->num_chroma_blocks = (1 << ctx->chroma_factor) >> 1; + switch (ctx->chroma_factor) { + case 2: + avctx->pix_fmt = PIX_FMT_YUV422P10; + break; + case 3: + avctx->pix_fmt = PIX_FMT_YUV444P10; + break; + default: + av_log(avctx, AV_LOG_ERROR, + "unsupported picture format: %d!\n", ctx->pic_format); + return -1; + } + + if (ctx->scantable_type != ctx->frame_type) { + if (!ctx->frame_type) + ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, + progressive_scan); + else + ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, + interlaced_scan); + ctx->scantable_type = ctx->frame_type; + } + + if (ctx->frame_type) { /* if interlaced */ + ctx->picture.interlaced_frame = 1; + ctx->picture.top_field_first = ctx->frame_type & 1; + } + + ctx->qmat_changed = 0; + ptr = buf + 20; + flags = buf[19]; + if (flags & 2) { + if (ptr - buf > hdr_size - 64) { + av_log(avctx, AV_LOG_ERROR, "Too short header data\n"); + return -1; + } + if (memcmp(ctx->qmat_luma, ptr, 64)) { + memcpy(ctx->qmat_luma, ptr, 64); + ctx->qmat_changed = 1; + } + ptr += 64; + } else { + memset(ctx->qmat_luma, 4, 64); + ctx->qmat_changed = 1; + } + + if (flags & 1) { + if (ptr - buf > hdr_size - 64) { + av_log(avctx, AV_LOG_ERROR, "Too short header data\n"); + return -1; + } + if (memcmp(ctx->qmat_chroma, ptr, 64)) { + memcpy(ctx->qmat_chroma, ptr, 64); + ctx->qmat_changed = 1; + } + } else { + memset(ctx->qmat_chroma, 4, 64); + ctx->qmat_changed = 1; + } + + return hdr_size; +} + + +static int decode_picture_header(ProresContext *ctx, const uint8_t *buf, + const int data_size, AVCodecContext *avctx) +{ + int i, hdr_size, pic_data_size, num_slices; + int slice_width_factor, slice_height_factor; + int remainder, num_x_slices; + const uint8_t *data_ptr, *index_ptr; + + hdr_size = data_size > 0 ? buf[0] >> 3 : 0; + if (hdr_size < 8 || hdr_size > data_size) { + av_log(avctx, AV_LOG_ERROR, "picture header too short!\n"); + return -1; + } + + pic_data_size = AV_RB32(buf + 1); + if (pic_data_size > data_size) { + av_log(avctx, AV_LOG_ERROR, "picture data too short!\n"); + return -1; + } + + slice_width_factor = buf[7] >> 4; + slice_height_factor = buf[7] & 0xF; + if (slice_width_factor > 3 || slice_height_factor) { + av_log(avctx, AV_LOG_ERROR, + "unsupported slice dimension: %d x %d!\n", + 1 << slice_width_factor, 1 << slice_height_factor); + return -1; + } + + ctx->slice_width_factor = slice_width_factor; + ctx->slice_height_factor = slice_height_factor; + + ctx->num_x_mbs = (avctx->width + 15) >> 4; + ctx->num_y_mbs = + (avctx->height + (1 << (4 + ctx->picture.interlaced_frame)) - 1) >> + (4 + ctx->picture.interlaced_frame); + + remainder = ctx->num_x_mbs & ((1 << slice_width_factor) - 1); + num_x_slices = (ctx->num_x_mbs >> slice_width_factor) + (remainder & 1) + + ((remainder >> 1) & 1) + ((remainder >> 2) & 1); + + num_slices = num_x_slices * ctx->num_y_mbs; + if (num_slices != AV_RB16(buf + 5)) { + av_log(avctx, AV_LOG_ERROR, "invalid number of slices!\n"); + return -1; + } + + if (ctx->total_slices != num_slices) { + av_freep(&ctx->slice_data_index); + ctx->slice_data_index = + av_malloc((num_slices + 1) * sizeof(uint8_t*)); + if (!ctx->slice_data_index) + return AVERROR(ENOMEM); + ctx->total_slices = num_slices; + } + + if (hdr_size + num_slices * 2 > data_size) { + av_log(avctx, AV_LOG_ERROR, "slice table too short!\n"); + return -1; + } + + /* parse slice table allowing quick access to the slice data */ + index_ptr = buf + hdr_size; + data_ptr = index_ptr + num_slices * 2; + + for (i = 0; i < num_slices; i++) { + ctx->slice_data_index[i] = data_ptr; + data_ptr += AV_RB16(index_ptr + i * 2); + } + ctx->slice_data_index[i] = data_ptr; + + if (data_ptr > buf + data_size) { + av_log(avctx, AV_LOG_ERROR, "out of slice data!\n"); + return -1; + } + + return pic_data_size; +} + + +/** + * Read an unsigned rice/exp golomb codeword. + */ +static inline int decode_vlc_codeword(GetBitContext *gb, uint8_t codebook) +{ + unsigned int rice_order, exp_order, switch_bits; + unsigned int buf, code; + int log, prefix_len, len; + + OPEN_READER(re, gb); + UPDATE_CACHE(re, gb); + buf = GET_CACHE(re, gb); + + /* number of prefix bits to switch between Rice and expGolomb */ + switch_bits = (codebook & 3) + 1; + rice_order = codebook >> 5; /* rice code order */ + exp_order = (codebook >> 2) & 7; /* exp golomb code order */ + + log = 31 - av_log2(buf); /* count prefix bits (zeroes) */ + + if (log < switch_bits) { /* ok, we got a rice code */ + if (!rice_order) { + /* shortcut for faster decoding of rice codes without remainder */ + code = log; + LAST_SKIP_BITS(re, gb, log + 1); + } else { + prefix_len = log + 1; + code = (log << rice_order) + NEG_USR32((buf << prefix_len), rice_order); + LAST_SKIP_BITS(re, gb, prefix_len + rice_order); + } + } else { /* otherwise we got a exp golomb code */ + len = (log << 1) - switch_bits + exp_order + 1; + code = NEG_USR32(buf, len) - (1 << exp_order) + (switch_bits << rice_order); + LAST_SKIP_BITS(re, gb, len); + } + + CLOSE_READER(re, gb); + + return code; +} + +#define LSB2SIGN(x) (-((x) & 1)) +#define TOSIGNED(x) (((x) >> 1) ^ LSB2SIGN(x)) + +#define FIRST_DC_CB 0xB8 // rice_order = 5, exp_golomb_order = 6, switch_bits = 0 + +static uint8_t dc_codebook[4] = { + 0x04, // rice_order = 0, exp_golomb_order = 1, switch_bits = 0 + 0x28, // rice_order = 1, exp_golomb_order = 2, switch_bits = 0 + 0x4D, // rice_order = 2, exp_golomb_order = 3, switch_bits = 1 + 0x70 // rice_order = 3, exp_golomb_order = 4, switch_bits = 0 +}; + + +/** + * Decode DC coefficients for all blocks in a slice. + */ +static inline void decode_dc_coeffs(GetBitContext *gb, DCTELEM *out, + int nblocks) +{ + DCTELEM prev_dc; + int i, sign; + int16_t delta; + unsigned int code; + + code = decode_vlc_codeword(gb, FIRST_DC_CB); + out[0] = prev_dc = TOSIGNED(code); + + out += 64; /* move to the DC coeff of the next block */ + delta = 3; + + for (i = 1; i < nblocks; i++, out += 64) { + code = decode_vlc_codeword(gb, dc_codebook[FFMIN(FFABS(delta), 3)]); + + sign = -(((delta >> 15) & 1) ^ (code & 1)); + delta = (((code + 1) >> 1) ^ sign) - sign; + prev_dc += delta; + out[0] = prev_dc; + } +} + + +static uint8_t ac_codebook[7] = { + 0x04, // rice_order = 0, exp_golomb_order = 1, switch_bits = 0 + 0x28, // rice_order = 1, exp_golomb_order = 2, switch_bits = 0 + 0x4C, // rice_order = 2, exp_golomb_order = 3, switch_bits = 0 + 0x05, // rice_order = 0, exp_golomb_order = 1, switch_bits = 1 + 0x29, // rice_order = 1, exp_golomb_order = 2, switch_bits = 1 + 0x06, // rice_order = 0, exp_golomb_order = 1, switch_bits = 2 + 0x0A, // rice_order = 0, exp_golomb_order = 2, switch_bits = 2 +}; + +/** + * Lookup tables for adaptive switching between codebooks + * according with previous run/level value. + */ +static uint8_t run_to_cb_index[16] = + { 5, 5, 3, 3, 0, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 2 }; + +static uint8_t lev_to_cb_index[10] = { 0, 6, 3, 5, 0, 1, 1, 1, 1, 2 }; + + +/** + * Decode AC coefficients for all blocks in a slice. + */ +static inline void decode_ac_coeffs(GetBitContext *gb, DCTELEM *out, + int blocks_per_slice, + int plane_size_factor, + const uint8_t *scan) +{ + int pos, block_mask, run, level, sign, run_cb_index, lev_cb_index; + int max_coeffs, bits_left; + + /* set initial prediction values */ + run = 4; + level = 2; + + max_coeffs = blocks_per_slice << 6; + block_mask = blocks_per_slice - 1; + + for (pos = blocks_per_slice - 1; pos < max_coeffs;) { + run_cb_index = run_to_cb_index[FFMIN(run, 15)]; + lev_cb_index = lev_to_cb_index[FFMIN(level, 9)]; + + bits_left = get_bits_left(gb); + if (bits_left <= 8 && !show_bits(gb, bits_left)) + return; + + run = decode_vlc_codeword(gb, ac_codebook[run_cb_index]); + + bits_left = get_bits_left(gb); + if (bits_left <= 8 && !show_bits(gb, bits_left)) + return; + + level = decode_vlc_codeword(gb, ac_codebook[lev_cb_index]) + 1; + + pos += run + 1; + if (pos >= max_coeffs) + break; + + sign = get_sbits(gb, 1); + out[((pos & block_mask) << 6) + scan[pos >> plane_size_factor]] = + (level ^ sign) - sign; + } +} + + +#define CLIP_AND_BIAS(x) (av_clip((x) + BIAS, CLIP_MIN, CLIP_MAX)) + +/** + * Add bias value, clamp and output pixels of a slice + */ +static void put_pixels(const DCTELEM *in, uint16_t *out, int stride, + int mbs_per_slice, int blocks_per_mb) +{ + int mb, x, y, src_offset, dst_offset; + const DCTELEM *src1, *src2; + uint16_t *dst1, *dst2; + + src1 = in; + src2 = in + (blocks_per_mb << 5); + dst1 = out; + dst2 = out + (stride << 3); + + for (mb = 0; mb < mbs_per_slice; mb++) { + for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += stride) { + for (x = 0; x < 8; x++) { + src_offset = (y << 3) + x; + + dst1[dst_offset + x] = CLIP_AND_BIAS(src1[src_offset]); + dst2[dst_offset + x] = CLIP_AND_BIAS(src2[src_offset]); + + if (blocks_per_mb > 2) { + dst1[dst_offset + x + 8] = + CLIP_AND_BIAS(src1[src_offset + 64]); + dst2[dst_offset + x + 8] = + CLIP_AND_BIAS(src2[src_offset + 64]); + } + } + } + + src1 += blocks_per_mb << 6; + src2 += blocks_per_mb << 6; + dst1 += blocks_per_mb << 2; + dst2 += blocks_per_mb << 2; + } +} + + +/** + * Decode a slice plane (luma or chroma). + */ +static void decode_slice_plane(ProresContext *ctx, const uint8_t *buf, + int data_size, uint16_t *out_ptr, + int linesize, int mbs_per_slice, + int blocks_per_mb, int plane_size_factor, + const int16_t *qmat) +{ + GetBitContext gb; + DCTELEM *block_ptr; + int i, blk_num, blocks_per_slice; + + blocks_per_slice = mbs_per_slice * blocks_per_mb; + + memset(ctx->blocks, 0, 8 * 4 * 64 * sizeof(*ctx->blocks)); + + init_get_bits(&gb, buf, data_size << 3); + + decode_dc_coeffs(&gb, ctx->blocks, blocks_per_slice); + + decode_ac_coeffs(&gb, ctx->blocks, blocks_per_slice, + plane_size_factor, ctx->scantable.permutated); + + /* inverse quantization, inverse transform and output */ + block_ptr = ctx->blocks; + + for (blk_num = 0; blk_num < blocks_per_slice; + blk_num++, block_ptr += 64) { + /* TODO: the correct solution shoud be (block_ptr[i] * qmat[i]) >> 1 + * and the input of the inverse transform should be scaled by 2 + * in order to avoid rounding errors. + * Due to the fact the existing Libav transforms are incompatible with + * that input I temporally introduced the coarse solution below... */ + for (i = 0; i < 64; i++) + block_ptr[i] = (block_ptr[i] * qmat[i]) >> 2; + + ctx->dsp.idct(block_ptr); + } + + put_pixels(ctx->blocks, out_ptr, linesize >> 1, mbs_per_slice, + blocks_per_mb); +} + + +static int decode_slice(ProresContext *ctx, int pic_num, int slice_num, + int mb_x_pos, int mb_y_pos, int mbs_per_slice, + AVCodecContext *avctx) +{ + const uint8_t *buf; + uint8_t *y_data, *u_data, *v_data; + AVFrame *pic = avctx->coded_frame; + int i, sf, slice_width_factor; + int slice_data_size, hdr_size, y_data_size, u_data_size, v_data_size; + int y_linesize, u_linesize, v_linesize; + + buf = ctx->slice_data_index[slice_num]; + slice_data_size = ctx->slice_data_index[slice_num + 1] - buf; + + slice_width_factor = av_log2(mbs_per_slice); + + y_data = pic->data[0]; + u_data = pic->data[1]; + v_data = pic->data[2]; + y_linesize = pic->linesize[0]; + u_linesize = pic->linesize[1]; + v_linesize = pic->linesize[2]; + + if (pic->interlaced_frame) { + if (!(pic_num ^ pic->top_field_first)) { + y_data += y_linesize; + u_data += u_linesize; + v_data += v_linesize; + } + y_linesize <<= 1; + u_linesize <<= 1; + v_linesize <<= 1; + } + + if (slice_data_size < 6) { + av_log(avctx, AV_LOG_ERROR, "slice data too short!\n"); + return -1; + } + + /* parse slice header */ + hdr_size = buf[0] >> 3; + 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 (v_data_size < 0 || hdr_size < 6) { + av_log(avctx, AV_LOG_ERROR, "invalid data sizes!\n"); + return -1; + } + + sf = av_clip(buf[1], 1, 224); + sf = sf > 128 ? (sf - 96) << 2 : sf; + + /* scale quantization matrixes according with slice's scale factor */ + /* TODO: this can be SIMD-optimized alot */ + if (ctx->qmat_changed || sf != ctx->prev_slice_sf) { + ctx->prev_slice_sf = sf; + for (i = 0; i < 64; i++) { + ctx->qmat_luma_scaled[i] = ctx->qmat_luma[i] * sf; + ctx->qmat_chroma_scaled[i] = ctx->qmat_chroma[i] * sf; + } + } + + /* decode luma plane */ + decode_slice_plane(ctx, buf + hdr_size, y_data_size, + (uint16_t*) (y_data + (mb_y_pos << 4) * y_linesize + + (mb_x_pos << 5)), y_linesize, + mbs_per_slice, 4, slice_width_factor + 2, + ctx->qmat_luma_scaled); + + /* decode U chroma plane */ + decode_slice_plane(ctx, buf + hdr_size + y_data_size, u_data_size, + (uint16_t*) (u_data + (mb_y_pos << 4) * u_linesize + + (mb_x_pos << ctx->mb_chroma_factor)), + u_linesize, mbs_per_slice, ctx->num_chroma_blocks, + slice_width_factor + ctx->chroma_factor - 1, + ctx->qmat_chroma_scaled); + + /* decode V chroma plane */ + decode_slice_plane(ctx, buf + hdr_size + y_data_size + u_data_size, + v_data_size, + (uint16_t*) (v_data + (mb_y_pos << 4) * v_linesize + + (mb_x_pos << ctx->mb_chroma_factor)), + v_linesize, mbs_per_slice, ctx->num_chroma_blocks, + slice_width_factor + ctx->chroma_factor - 1, + ctx->qmat_chroma_scaled); + + return 0; +} + + +static int decode_picture(ProresContext *ctx, int pic_num, + AVCodecContext *avctx) +{ + int slice_num, slice_width, x_pos, y_pos; + + slice_num = 0; + + for (y_pos = 0; y_pos < ctx->num_y_mbs; y_pos++) { + slice_width = 1 << ctx->slice_width_factor; + + for (x_pos = 0; x_pos < ctx->num_x_mbs && slice_width; + x_pos += slice_width) { + while (ctx->num_x_mbs - x_pos < slice_width) + slice_width >>= 1; + + if (decode_slice(ctx, pic_num, slice_num, x_pos, y_pos, + slice_width, avctx) < 0) + return -1; + + slice_num++; + } + } + + return 0; +} + + +#define FRAME_ID MKBETAG('i', 'c', 'p', 'f') +#define MOVE_DATA_PTR(nbytes) buf += (nbytes); buf_size -= (nbytes) + +static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, + AVPacket *avpkt) +{ + ProresContext *ctx = avctx->priv_data; + AVFrame *picture = avctx->coded_frame; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + int frame_hdr_size, pic_num, pic_data_size; + + /* check frame atom container */ + if (buf_size < 28 || buf_size < AV_RB32(buf) || + AV_RB32(buf + 4) != FRAME_ID) { + av_log(avctx, AV_LOG_ERROR, "invalid frame\n"); + return -1; + } + + MOVE_DATA_PTR(8); + + frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx); + if (frame_hdr_size < 0) + return -1; + + MOVE_DATA_PTR(frame_hdr_size); + + if (picture->data[0]) + avctx->release_buffer(avctx, picture); + + picture->reference = 0; + if (avctx->get_buffer(avctx, picture) < 0) + return -1; + + for (pic_num = 0; ctx->picture.interlaced_frame - pic_num + 1; pic_num++) { + pic_data_size = decode_picture_header(ctx, buf, buf_size, avctx); + if (pic_data_size < 0) + return -1; + + if (decode_picture(ctx, pic_num, avctx)) + return -1; + + MOVE_DATA_PTR(pic_data_size); + } + + *data_size = sizeof(AVPicture); + *(AVFrame*) data = *avctx->coded_frame; + + return avpkt->size; +} + + +static av_cold int decode_close(AVCodecContext *avctx) +{ + ProresContext *ctx = avctx->priv_data; + + if (ctx->picture.data[0]) + avctx->release_buffer(avctx, &ctx->picture); + + av_freep(&ctx->slice_data_index); + + return 0; +} + + +AVCodec ff_prores_decoder = { + .name = "ProRes", + .type = AVMEDIA_TYPE_VIDEO, + .id = CODEC_ID_PRORES, + .priv_data_size = sizeof(ProresContext), + .init = decode_init, + .close = decode_close, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)") +}; -- cgit v1.1