diff options
Diffstat (limited to 'ffmpeg/libavcodec/utvideodec.c')
| -rw-r--r-- | ffmpeg/libavcodec/utvideodec.c | 555 |
1 files changed, 0 insertions, 555 deletions
diff --git a/ffmpeg/libavcodec/utvideodec.c b/ffmpeg/libavcodec/utvideodec.c deleted file mode 100644 index e3ef22d..0000000 --- a/ffmpeg/libavcodec/utvideodec.c +++ /dev/null @@ -1,555 +0,0 @@ -/* - * Ut Video decoder - * Copyright (c) 2011 Konstantin Shishkov - * - * 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 - * Ut Video decoder - */ - -#include <stdlib.h> - -#include "libavutil/intreadwrite.h" -#include "avcodec.h" -#include "bytestream.h" -#include "get_bits.h" -#include "dsputil.h" -#include "thread.h" -#include "utvideo.h" - -static int build_huff(const uint8_t *src, VLC *vlc, int *fsym) -{ - int i; - HuffEntry he[256]; - int last; - uint32_t codes[256]; - uint8_t bits[256]; - uint8_t syms[256]; - uint32_t code; - - *fsym = -1; - for (i = 0; i < 256; i++) { - he[i].sym = i; - he[i].len = *src++; - } - qsort(he, 256, sizeof(*he), ff_ut_huff_cmp_len); - - if (!he[0].len) { - *fsym = he[0].sym; - return 0; - } - if (he[0].len > 32) - return -1; - - last = 255; - while (he[last].len == 255 && last) - last--; - - code = 1; - for (i = last; i >= 0; i--) { - codes[i] = code >> (32 - he[i].len); - bits[i] = he[i].len; - syms[i] = he[i].sym; - code += 0x80000000u >> (he[i].len - 1); - } - - return ff_init_vlc_sparse(vlc, FFMIN(he[last].len, 10), last + 1, - bits, sizeof(*bits), sizeof(*bits), - codes, sizeof(*codes), sizeof(*codes), - syms, sizeof(*syms), sizeof(*syms), 0); -} - -static int decode_plane(UtvideoContext *c, int plane_no, - uint8_t *dst, int step, int stride, - int width, int height, - const uint8_t *src, int use_pred) -{ - int i, j, slice, pix; - int sstart, send; - VLC vlc; - GetBitContext gb; - int prev, fsym; - const int cmask = ~(!plane_no && c->avctx->pix_fmt == AV_PIX_FMT_YUV420P); - - if (build_huff(src, &vlc, &fsym)) { - av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n"); - return AVERROR_INVALIDDATA; - } - if (fsym >= 0) { // build_huff reported a symbol to fill slices with - send = 0; - for (slice = 0; slice < c->slices; slice++) { - uint8_t *dest; - - sstart = send; - send = (height * (slice + 1) / c->slices) & cmask; - dest = dst + sstart * stride; - - prev = 0x80; - for (j = sstart; j < send; j++) { - for (i = 0; i < width * step; i += step) { - pix = fsym; - if (use_pred) { - prev += pix; - pix = prev; - } - dest[i] = pix; - } - dest += stride; - } - } - return 0; - } - - src += 256; - - send = 0; - for (slice = 0; slice < c->slices; slice++) { - uint8_t *dest; - int slice_data_start, slice_data_end, slice_size; - - sstart = send; - send = (height * (slice + 1) / c->slices) & cmask; - dest = dst + sstart * stride; - - // slice offset and size validation was done earlier - slice_data_start = slice ? AV_RL32(src + slice * 4 - 4) : 0; - slice_data_end = AV_RL32(src + slice * 4); - slice_size = slice_data_end - slice_data_start; - - if (!slice_size) { - av_log(c->avctx, AV_LOG_ERROR, "Plane has more than one symbol " - "yet a slice has a length of zero.\n"); - goto fail; - } - - memcpy(c->slice_bits, src + slice_data_start + c->slices * 4, - slice_size); - memset(c->slice_bits + slice_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); - c->dsp.bswap_buf((uint32_t *) c->slice_bits, (uint32_t *) c->slice_bits, - (slice_data_end - slice_data_start + 3) >> 2); - init_get_bits(&gb, c->slice_bits, slice_size * 8); - - prev = 0x80; - for (j = sstart; j < send; j++) { - for (i = 0; i < width * step; i += step) { - if (get_bits_left(&gb) <= 0) { - av_log(c->avctx, AV_LOG_ERROR, - "Slice decoding ran out of bits\n"); - goto fail; - } - pix = get_vlc2(&gb, vlc.table, vlc.bits, 4); - if (pix < 0) { - av_log(c->avctx, AV_LOG_ERROR, "Decoding error\n"); - goto fail; - } - if (use_pred) { - prev += pix; - pix = prev; - } - dest[i] = pix; - } - dest += stride; - } - if (get_bits_left(&gb) > 32) - av_log(c->avctx, AV_LOG_WARNING, - "%d bits left after decoding slice\n", get_bits_left(&gb)); - } - - ff_free_vlc(&vlc); - - return 0; -fail: - ff_free_vlc(&vlc); - return AVERROR_INVALIDDATA; -} - -static void restore_rgb_planes(uint8_t *src, int step, int stride, int width, - int height) -{ - int i, j; - uint8_t r, g, b; - - for (j = 0; j < height; j++) { - for (i = 0; i < width * step; i += step) { - r = src[i]; - g = src[i + 1]; - b = src[i + 2]; - src[i] = r + g - 0x80; - src[i + 2] = b + g - 0x80; - } - src += stride; - } -} - -static void restore_median(uint8_t *src, int step, int stride, - int width, int height, int slices, int rmode) -{ - int i, j, slice; - int A, B, C; - uint8_t *bsrc; - int slice_start, slice_height; - const int cmask = ~rmode; - - for (slice = 0; slice < slices; slice++) { - slice_start = ((slice * height) / slices) & cmask; - slice_height = ((((slice + 1) * height) / slices) & cmask) - - slice_start; - - bsrc = src + slice_start * stride; - - // first line - left neighbour prediction - bsrc[0] += 0x80; - A = bsrc[0]; - for (i = step; i < width * step; i += step) { - bsrc[i] += A; - A = bsrc[i]; - } - bsrc += stride; - if (slice_height == 1) - continue; - // second line - first element has top prediction, the rest uses median - C = bsrc[-stride]; - bsrc[0] += C; - A = bsrc[0]; - for (i = step; i < width * step; i += step) { - B = bsrc[i - stride]; - bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C)); - C = B; - A = bsrc[i]; - } - bsrc += stride; - // the rest of lines use continuous median prediction - for (j = 2; j < slice_height; j++) { - for (i = 0; i < width * step; i += step) { - B = bsrc[i - stride]; - bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C)); - C = B; - A = bsrc[i]; - } - bsrc += stride; - } - } -} - -/* UtVideo interlaced mode treats every two lines as a single one, - * so restoring function should take care of possible padding between - * two parts of the same "line". - */ -static void restore_median_il(uint8_t *src, int step, int stride, - int width, int height, int slices, int rmode) -{ - int i, j, slice; - int A, B, C; - uint8_t *bsrc; - int slice_start, slice_height; - const int cmask = ~(rmode ? 3 : 1); - const int stride2 = stride << 1; - - for (slice = 0; slice < slices; slice++) { - slice_start = ((slice * height) / slices) & cmask; - slice_height = ((((slice + 1) * height) / slices) & cmask) - - slice_start; - slice_height >>= 1; - - bsrc = src + slice_start * stride; - - // first line - left neighbour prediction - bsrc[0] += 0x80; - A = bsrc[0]; - for (i = step; i < width * step; i += step) { - bsrc[i] += A; - A = bsrc[i]; - } - for (i = 0; i < width * step; i += step) { - bsrc[stride + i] += A; - A = bsrc[stride + i]; - } - bsrc += stride2; - if (slice_height == 1) - continue; - // second line - first element has top prediction, the rest uses median - C = bsrc[-stride2]; - bsrc[0] += C; - A = bsrc[0]; - for (i = step; i < width * step; i += step) { - B = bsrc[i - stride2]; - bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C)); - C = B; - A = bsrc[i]; - } - for (i = 0; i < width * step; i += step) { - B = bsrc[i - stride]; - bsrc[stride + i] += mid_pred(A, B, (uint8_t)(A + B - C)); - C = B; - A = bsrc[stride + i]; - } - bsrc += stride2; - // the rest of lines use continuous median prediction - for (j = 2; j < slice_height; j++) { - for (i = 0; i < width * step; i += step) { - B = bsrc[i - stride2]; - bsrc[i] += mid_pred(A, B, (uint8_t)(A + B - C)); - C = B; - A = bsrc[i]; - } - for (i = 0; i < width * step; i += step) { - B = bsrc[i - stride]; - bsrc[i + stride] += mid_pred(A, B, (uint8_t)(A + B - C)); - C = B; - A = bsrc[i + stride]; - } - bsrc += stride2; - } - } -} - -static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - UtvideoContext *c = avctx->priv_data; - int i, j; - const uint8_t *plane_start[5]; - int plane_size, max_slice_size = 0, slice_start, slice_end, slice_size; - int ret; - GetByteContext gb; - ThreadFrame frame = { .f = data }; - - if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) - return ret; - - /* parse plane structure to get frame flags and validate slice offsets */ - bytestream2_init(&gb, buf, buf_size); - for (i = 0; i < c->planes; i++) { - plane_start[i] = gb.buffer; - if (bytestream2_get_bytes_left(&gb) < 256 + 4 * c->slices) { - av_log(avctx, AV_LOG_ERROR, "Insufficient data for a plane\n"); - return AVERROR_INVALIDDATA; - } - bytestream2_skipu(&gb, 256); - slice_start = 0; - slice_end = 0; - for (j = 0; j < c->slices; j++) { - slice_end = bytestream2_get_le32u(&gb); - slice_size = slice_end - slice_start; - if (slice_end < 0 || slice_size < 0 || - bytestream2_get_bytes_left(&gb) < slice_end) { - av_log(avctx, AV_LOG_ERROR, "Incorrect slice size\n"); - return AVERROR_INVALIDDATA; - } - slice_start = slice_end; - max_slice_size = FFMAX(max_slice_size, slice_size); - } - plane_size = slice_end; - bytestream2_skipu(&gb, plane_size); - } - plane_start[c->planes] = gb.buffer; - if (bytestream2_get_bytes_left(&gb) < c->frame_info_size) { - av_log(avctx, AV_LOG_ERROR, "Not enough data for frame information\n"); - return AVERROR_INVALIDDATA; - } - c->frame_info = bytestream2_get_le32u(&gb); - av_log(avctx, AV_LOG_DEBUG, "frame information flags %X\n", c->frame_info); - - c->frame_pred = (c->frame_info >> 8) & 3; - - if (c->frame_pred == PRED_GRADIENT) { - avpriv_request_sample(avctx, "Frame with gradient prediction"); - return AVERROR_PATCHWELCOME; - } - - av_fast_malloc(&c->slice_bits, &c->slice_bits_size, - max_slice_size + FF_INPUT_BUFFER_PADDING_SIZE); - - if (!c->slice_bits) { - av_log(avctx, AV_LOG_ERROR, "Cannot allocate temporary buffer\n"); - return AVERROR(ENOMEM); - } - - switch (c->avctx->pix_fmt) { - case AV_PIX_FMT_RGB24: - case AV_PIX_FMT_RGBA: - for (i = 0; i < c->planes; i++) { - ret = decode_plane(c, i, frame.f->data[0] + ff_ut_rgb_order[i], - c->planes, frame.f->linesize[0], avctx->width, - avctx->height, plane_start[i], - c->frame_pred == PRED_LEFT); - if (ret) - return ret; - if (c->frame_pred == PRED_MEDIAN) { - if (!c->interlaced) { - restore_median(frame.f->data[0] + ff_ut_rgb_order[i], - c->planes, frame.f->linesize[0], avctx->width, - avctx->height, c->slices, 0); - } else { - restore_median_il(frame.f->data[0] + ff_ut_rgb_order[i], - c->planes, frame.f->linesize[0], - avctx->width, avctx->height, c->slices, - 0); - } - } - } - restore_rgb_planes(frame.f->data[0], c->planes, frame.f->linesize[0], - avctx->width, avctx->height); - break; - case AV_PIX_FMT_YUV420P: - for (i = 0; i < 3; i++) { - ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i], - avctx->width >> !!i, avctx->height >> !!i, - plane_start[i], c->frame_pred == PRED_LEFT); - if (ret) - return ret; - if (c->frame_pred == PRED_MEDIAN) { - if (!c->interlaced) { - restore_median(frame.f->data[i], 1, frame.f->linesize[i], - avctx->width >> !!i, avctx->height >> !!i, - c->slices, !i); - } else { - restore_median_il(frame.f->data[i], 1, frame.f->linesize[i], - avctx->width >> !!i, - avctx->height >> !!i, - c->slices, !i); - } - } - } - break; - case AV_PIX_FMT_YUV422P: - for (i = 0; i < 3; i++) { - ret = decode_plane(c, i, frame.f->data[i], 1, frame.f->linesize[i], - avctx->width >> !!i, avctx->height, - plane_start[i], c->frame_pred == PRED_LEFT); - if (ret) - return ret; - if (c->frame_pred == PRED_MEDIAN) { - if (!c->interlaced) { - restore_median(frame.f->data[i], 1, frame.f->linesize[i], - avctx->width >> !!i, avctx->height, - c->slices, 0); - } else { - restore_median_il(frame.f->data[i], 1, frame.f->linesize[i], - avctx->width >> !!i, avctx->height, - c->slices, 0); - } - } - } - break; - } - - frame.f->key_frame = 1; - frame.f->pict_type = AV_PICTURE_TYPE_I; - frame.f->interlaced_frame = !!c->interlaced; - - *got_frame = 1; - - /* always report that the buffer was completely consumed */ - return buf_size; -} - -static av_cold int decode_init(AVCodecContext *avctx) -{ - UtvideoContext * const c = avctx->priv_data; - - c->avctx = avctx; - - ff_dsputil_init(&c->dsp, avctx); - - if (avctx->extradata_size < 16) { - av_log(avctx, AV_LOG_ERROR, - "Insufficient extradata size %d, should be at least 16\n", - avctx->extradata_size); - return AVERROR_INVALIDDATA; - } - - av_log(avctx, AV_LOG_DEBUG, "Encoder version %d.%d.%d.%d\n", - avctx->extradata[3], avctx->extradata[2], - avctx->extradata[1], avctx->extradata[0]); - av_log(avctx, AV_LOG_DEBUG, "Original format %X\n", - AV_RB32(avctx->extradata + 4)); - c->frame_info_size = AV_RL32(avctx->extradata + 8); - c->flags = AV_RL32(avctx->extradata + 12); - - if (c->frame_info_size != 4) - avpriv_request_sample(avctx, "Frame info not 4 bytes"); - av_log(avctx, AV_LOG_DEBUG, "Encoding parameters %08X\n", c->flags); - c->slices = (c->flags >> 24) + 1; - c->compression = c->flags & 1; - c->interlaced = c->flags & 0x800; - - c->slice_bits_size = 0; - - switch (avctx->codec_tag) { - case MKTAG('U', 'L', 'R', 'G'): - c->planes = 3; - avctx->pix_fmt = AV_PIX_FMT_RGB24; - break; - case MKTAG('U', 'L', 'R', 'A'): - c->planes = 4; - avctx->pix_fmt = AV_PIX_FMT_RGBA; - break; - case MKTAG('U', 'L', 'Y', '0'): - c->planes = 3; - avctx->pix_fmt = AV_PIX_FMT_YUV420P; - avctx->colorspace = AVCOL_SPC_BT470BG; - break; - case MKTAG('U', 'L', 'Y', '2'): - c->planes = 3; - avctx->pix_fmt = AV_PIX_FMT_YUV422P; - avctx->colorspace = AVCOL_SPC_BT470BG; - break; - case MKTAG('U', 'L', 'H', '0'): - c->planes = 3; - avctx->pix_fmt = AV_PIX_FMT_YUV420P; - avctx->colorspace = AVCOL_SPC_BT709; - break; - case MKTAG('U', 'L', 'H', '2'): - c->planes = 3; - avctx->pix_fmt = AV_PIX_FMT_YUV422P; - avctx->colorspace = AVCOL_SPC_BT709; - break; - default: - av_log(avctx, AV_LOG_ERROR, "Unknown Ut Video FOURCC provided (%08X)\n", - avctx->codec_tag); - return AVERROR_INVALIDDATA; - } - - return 0; -} - -static av_cold int decode_end(AVCodecContext *avctx) -{ - UtvideoContext * const c = avctx->priv_data; - - av_freep(&c->slice_bits); - - return 0; -} - -AVCodec ff_utvideo_decoder = { - .name = "utvideo", - .long_name = NULL_IF_CONFIG_SMALL("Ut Video"), - .type = AVMEDIA_TYPE_VIDEO, - .id = AV_CODEC_ID_UTVIDEO, - .priv_data_size = sizeof(UtvideoContext), - .init = decode_init, - .close = decode_end, - .decode = decode_frame, - .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, -}; |