X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Futvideo.c;h=eb5a92422219523d7725108444534b787e579396;hb=0652e024c680420d298cdf3719d0a0c030173fe3;hp=aac3969b1594de56b890efbcd88c6638322620af;hpb=0d8506b8c52659c5bfff9535391d5e95ddcd45f1;p=ffmpeg diff --git a/libavcodec/utvideo.c b/libavcodec/utvideo.c index aac3969b159..eb5a9242221 100644 --- a/libavcodec/utvideo.c +++ b/libavcodec/utvideo.c @@ -1,5 +1,5 @@ /* - * Ut Video decoder + * Common Ut Video code * Copyright (c) 2011 Konstantin Shishkov * * This file is part of Libav. @@ -21,440 +21,19 @@ /** * @file - * Ut Video decoder + * Common Ut Video code */ -#include +#include "utvideo.h" -#include "libavutil/intreadwrite.h" -#include "avcodec.h" -#include "bytestream.h" -#include "get_bits.h" -#include "dsputil.h" - -enum { - PRED_NONE = 0, - PRED_LEFT, - PRED_GRADIENT, - PRED_MEDIAN, +const int ff_ut_pred_order[5] = { + PRED_LEFT, PRED_MEDIAN, PRED_MEDIAN, PRED_NONE, PRED_GRADIENT }; -typedef struct UtvideoContext { - AVCodecContext *avctx; - AVFrame pic; - DSPContext dsp; - - uint32_t frame_info_size, flags, frame_info; - int planes; - int slices; - int compression; - int interlaced; - int frame_pred; - - uint8_t *slice_bits; - int slice_bits_size; -} UtvideoContext; +const int ff_ut_rgb_order[4] = { 1, 2, 0, 3 }; // G, B, R, A -typedef struct HuffEntry { - uint8_t sym; - uint8_t len; -} HuffEntry; - -static int huff_cmp(const void *a, const void *b) +int ff_ut_huff_cmp_len(const void *a, const void *b) { const HuffEntry *aa = a, *bb = b; return (aa->len - bb->len)*256 + aa->sym - bb->sym; } - -static int build_huff(const uint8_t *src, VLC *vlc) -{ - int i; - HuffEntry he[256]; - int last; - uint32_t codes[256]; - uint8_t bits[256]; - uint8_t syms[256]; - uint32_t code; - - for (i = 0; i < 256; i++) { - he[i].sym = i; - he[i].len = *src++; - } - qsort(he, 256, sizeof(*he), huff_cmp); - - if (!he[0].len || 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 init_vlc_sparse(vlc, FFMIN(he[last].len, 9), 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 src_size, int use_pred) -{ - int i, j, slice, pix; - int sstart, send; - VLC vlc; - GetBitContext gb; - int prev; - - if (build_huff(src, &vlc)) { - av_log(c->avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n"); - return AVERROR_INVALIDDATA; - } - - src += 256; - src_size -= 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; - 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) { - for (j = sstart; j < send; j++) { - for (i = 0; i < width * step; i += step) - dest[i] = 0x80; - dest += stride; - } - continue; - } - - 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)); - } - - free_vlc(&vlc); - - return 0; -fail: - free_vlc(&vlc); - return AVERROR_INVALIDDATA; -} - -static const int rgb_order[4] = { 1, 2, 0, 3 }; - -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 i, j, slice; - int A, B, C; - uint8_t *bsrc; - int slice_start, slice_height; - - for (slice = 0; slice < slices; slice++) { - slice_start = (slice * height) / slices; - slice_height = ((slice + 1) * height) / slices - 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 predition, 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; - } - } -} - -static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - int buf_size = avpkt->size; - const uint8_t *buf_end = buf + buf_size; - UtvideoContext *c = avctx->priv_data; - const uint8_t *ptr; - int i, j; - const uint8_t *plane_start[5]; - int plane_size, max_slice_size = 0, slice_start, slice_end, slice_size; - int ret; - - if (c->pic.data[0]) - avctx->release_buffer(avctx, &c->pic); - - c->pic.reference = 1; - c->pic.buffer_hints = FF_BUFFER_HINTS_VALID; - if ((ret = avctx->get_buffer(avctx, &c->pic)) < 0) { - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return ret; - } - - /* parse plane structure to retrieve frame flags and validate slice offsets */ - ptr = buf; - for (i = 0; i < c->planes; i++) { - plane_start[i] = ptr; - if (buf_end - ptr < 256 + 4 * c->slices) { - av_log(avctx, AV_LOG_ERROR, "Insufficient data for a plane\n"); - return AVERROR_INVALIDDATA; - } - ptr += 256; - slice_start = 0; - slice_end = 0; - for (j = 0; j < c->slices; j++) { - slice_end = bytestream_get_le32(&ptr); - slice_size = slice_end - slice_start; - if (slice_size < 0) { - 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; - if (buf_end - ptr < plane_size) { - av_log(avctx, AV_LOG_ERROR, "Plane size is bigger than available data\n"); - return AVERROR_INVALIDDATA; - } - ptr += plane_size; - } - plane_start[c->planes] = ptr; - if (buf_end - ptr < c->frame_info_size) { - av_log(avctx, AV_LOG_ERROR, "Not enough data for frame information\n"); - return AVERROR_INVALIDDATA; - } - c->frame_info = AV_RL32(ptr); - 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) { - av_log_ask_for_sample(avctx, "Frame uses gradient prediction\n"); - 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 PIX_FMT_RGB24: - case PIX_FMT_RGBA: - for (i = 0; i < c->planes; i++) { - ret = decode_plane(c, i, c->pic.data[0] + rgb_order[i], c->planes, - c->pic.linesize[0], avctx->width, avctx->height, - plane_start[i], plane_start[i + 1] - plane_start[i], - c->frame_pred == PRED_LEFT); - if (ret) - return ret; - if (c->frame_pred == PRED_MEDIAN) - restore_median(c->pic.data[0] + rgb_order[i], c->planes, - c->pic.linesize[0], avctx->width, avctx->height, - c->slices); - } - restore_rgb_planes(c->pic.data[0], c->planes, c->pic.linesize[0], - avctx->width, avctx->height); - break; - case PIX_FMT_YUV420P: - for (i = 0; i < 3; i++) { - ret = decode_plane(c, i, c->pic.data[i], 1, - c->pic.linesize[i], avctx->width >> !!i, avctx->height >> !!i, - plane_start[i], plane_start[i + 1] - plane_start[i], - c->frame_pred == PRED_LEFT); - if (ret) - return ret; - if (c->frame_pred == PRED_MEDIAN) - restore_median(c->pic.data[i], 1, c->pic.linesize[i], - avctx->width >> !!i, avctx->height >> !!i, - c->slices); - } - break; - case PIX_FMT_YUV422P: - for (i = 0; i < 3; i++) { - ret = decode_plane(c, i, c->pic.data[i], 1, - c->pic.linesize[i], avctx->width >> !!i, avctx->height, - plane_start[i], plane_start[i + 1] - plane_start[i], - c->frame_pred == PRED_LEFT); - if (ret) - return ret; - if (c->frame_pred == PRED_MEDIAN) - restore_median(c->pic.data[i], 1, c->pic.linesize[i], - avctx->width >> !!i, avctx->height, c->slices); - } - break; - } - - *data_size = sizeof(AVFrame); - *(AVFrame*)data = c->pic; - - /* 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; - - 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) - av_log_ask_for_sample(avctx, "Frame info is not 4 bytes\n"); - 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 = PIX_FMT_RGB24; - break; - case MKTAG('U', 'L', 'R', 'A'): - c->planes = 4; - avctx->pix_fmt = PIX_FMT_RGBA; - break; - case MKTAG('U', 'L', 'Y', '0'): - c->planes = 3; - avctx->pix_fmt = PIX_FMT_YUV420P; - break; - case MKTAG('U', 'L', 'Y', '2'): - c->planes = 3; - avctx->pix_fmt = PIX_FMT_YUV422P; - 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; - - if (c->pic.data[0]) - avctx->release_buffer(avctx, &c->pic); - - av_freep(&c->slice_bits); - - return 0; -} - -AVCodec ff_utvideo_decoder = { - .name = "utvideo", - .type = AVMEDIA_TYPE_VIDEO, - .id = CODEC_ID_UTVIDEO, - .priv_data_size = sizeof(UtvideoContext), - .init = decode_init, - .close = decode_end, - .decode = decode_frame, - .capabilities = CODEC_CAP_DR1, - .long_name = NULL_IF_CONFIG_SMALL("Ut Video"), -}; -