diff options
Diffstat (limited to 'libavcodec/proresdec2.c')
| -rw-r--r-- | libavcodec/proresdec2.c | 594 |
1 files changed, 594 insertions, 0 deletions
diff --git a/libavcodec/proresdec2.c b/libavcodec/proresdec2.c new file mode 100644 index 0000000000..b48259a3cd --- /dev/null +++ b/libavcodec/proresdec2.c @@ -0,0 +1,594 @@ +/* + * 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 "simple_idct.h" +#include "proresdec.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 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; + uint8_t idct_permutation[64]; + + avctx->bits_per_raw_sample = 10; + + ff_dsputil_init(&ctx->dsp, avctx); + ff_proresdsp_init(&ctx->prodsp, avctx); + + avctx->coded_frame = &ctx->frame; + ctx->frame.type = AV_PICTURE_TYPE_I; + ctx->frame.key_frame = 1; + + ff_init_scantable_permutation(idct_permutation, + ctx->prodsp.idct_permutation_type); + + permute(ctx->progressive_scan, progressive_scan, idct_permutation); + permute(ctx->interlaced_scan, 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 -1; + } + + 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 -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 resolution change: %dx%d -> %dx%d\n", + avctx->width, avctx->height, width, height); + return -1; + } + + ctx->frame_type = (buf[12] >> 2) & 3; + + 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; + } + + avctx->pix_fmt = (buf[12] & 0xC0) == 0xC0 ? PIX_FMT_YUV444P10 : PIX_FMT_YUV422P10; + + ptr = buf + 20; + flags = buf[19]; + av_dlog(avctx, "flags %x\n", flags); + + if (flags & 2) { + permute(ctx->qmat_luma, ctx->prodsp.idct_permutation, ptr); + ptr += 64; + } else { + memset(ctx->qmat_luma, 4, 64); + } + + if (flags & 1) { + 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 -1; + } + + 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 -1; + } + + 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 -1; + } + + 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 -1; + } + + // 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 -1; + } + + 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 -1; + } + } + + 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 -1; + } + + 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, DCTELEM *out, + int blocks_per_slice) +{ + DCTELEM 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 void decode_ac_coeffs(AVCodecContext *avctx, GetBitContext *gb, + DCTELEM *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; + } + + 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); +} + +static void 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(DCTELEM, blocks, [8*4*64]); + DCTELEM *block; + GetBitContext gb; + int i, blocks_per_slice = slice->mb_count<<2; + + 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); + decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice); + + 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; + } +} + +static void 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(DCTELEM, blocks, [8*4*64]); + DCTELEM *block; + GetBitContext gb; + int i, j, blocks_per_slice = slice->mb_count << log2_blocks_per_mb; + + 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); + decode_ac_coeffs(avctx, &gb, blocks, blocks_per_slice); + + 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; + } + } +} + +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 = avctx->coded_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; + uint8_t *dest_y, *dest_u, *dest_v; + int16_t qmat_luma_scaled[64]; + int16_t qmat_chroma_scaled[64]; + int mb_x_shift; + + //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); + + 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 -1; + } + + 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 == PIX_FMT_YUV444P10) { + 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); + + 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]; + } + + 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); + } + + return 0; +} + +static int decode_picture(AVCodecContext *avctx) +{ + ProresContext *ctx = avctx->priv_data; + int i, threads_ret[ctx->slice_count]; + + avctx->execute2(avctx, decode_slice_thread, NULL, threads_ret, ctx->slice_count); + + for (i = 0; i < ctx->slice_count; i++) + if (threads_ret[i] < 0) + return threads_ret[i]; + + return 0; +} + +static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, + AVPacket *avpkt) +{ + ProresContext *ctx = avctx->priv_data; + AVFrame *frame = avctx->coded_frame; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + int frame_hdr_size, pic_size; + + if (buf_size < 28 || AV_RL32(buf + 4) != AV_RL32("icpf")) { + av_log(avctx, AV_LOG_ERROR, "invalid frame header\n"); + return -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 -1; + + buf += frame_hdr_size; + buf_size -= frame_hdr_size; + + if (frame->data[0]) + avctx->release_buffer(avctx, frame); + + if (avctx->get_buffer(avctx, frame) < 0) + return -1; + + 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 -1; + } + + if (decode_picture(avctx)) { + av_log(avctx, AV_LOG_ERROR, "error decoding picture\n"); + return -1; + } + + buf += pic_size; + buf_size -= pic_size; + + if (ctx->frame_type && buf_size > 0 && ctx->first_field) { + ctx->first_field = 0; + goto decode_picture; + } + + *data_size = sizeof(AVFrame); + *(AVFrame*)data = *frame; + + return avpkt->size; +} + +static av_cold int decode_close(AVCodecContext *avctx) +{ + ProresContext *ctx = avctx->priv_data; + + AVFrame *frame = avctx->coded_frame; + if (frame->data[0]) + avctx->release_buffer(avctx, frame); + av_freep(&ctx->slices); + + 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, + .long_name = NULL_IF_CONFIG_SMALL("ProRes"), + .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, +}; |