/*
- * Ut Video decoder
+ * Common Ut Video code
* Copyright (c) 2011 Konstantin Shishkov
*
* This file is part of Libav.
/**
* @file
- * Ut Video decoder
+ * Common Ut Video code
*/
-#include <stdlib.h>
+#include "utvideo.h"
-#include "libavutil/intreadwrite.h"
-#include "avcodec.h"
-#include "bytestream.h"
-#include "get_bits.h"
-#include "dsputil.h"
-#include "thread.h"
-
-enum {
- PRED_NONE = 0,
- PRED_LEFT,
- PRED_GRADIENT,
- PRED_MEDIAN,
+#if FF_API_PRIVATE_OPT
+const int ff_ut_pred_order[5] = {
+ PRED_LEFT, PRED_MEDIAN, PRED_MEDIAN, PRED_NONE, PRED_GRADIENT
};
+#endif
-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 *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), huff_cmp);
-
- 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, 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, fsym;
- const int cmask = ~(!plane_no && c->avctx->pix_fmt == 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;
- 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) & 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) {
- 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));
- }
-
- ff_free_vlc(&vlc);
-
- return 0;
-fail:
- ff_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 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 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;
- }
- }
-}
-
-/* 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 predition, 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 *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])
- ff_thread_release_buffer(avctx, &c->pic);
-
- c->pic.reference = 1;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
- if ((ret = ff_thread_get_buffer(avctx, &c->pic)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return ret;
- }
-
- ff_thread_finish_setup(avctx);
-
- /* 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, 0);
- }
- 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) {
- if (!c->interlaced) {
- restore_median(c->pic.data[i], 1, c->pic.linesize[i],
- avctx->width >> !!i, avctx->height >> !!i,
- c->slices, !i);
- } else {
- restore_median_il(c->pic.data[i], 1, c->pic.linesize[i],
- avctx->width >> !!i,
- avctx->height >> !!i,
- c->slices, !i);
- }
- }
- }
- 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) {
- if (!c->interlaced) {
- restore_median(c->pic.data[i], 1, c->pic.linesize[i],
- avctx->width >> !!i, avctx->height,
- c->slices, 0);
- } else {
- restore_median_il(c->pic.data[i], 1, c->pic.linesize[i],
- avctx->width >> !!i, avctx->height,
- c->slices, 0);
- }
- }
- }
- break;
- }
-
- c->pic.key_frame = 1;
- c->pic.pict_type = AV_PICTURE_TYPE_I;
- *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;
-
- 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)
- 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])
- ff_thread_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 | CODEC_CAP_FRAME_THREADS,
- .long_name = NULL_IF_CONFIG_SMALL("Ut Video"),
-};
projects / ffmpeg / blobdiff