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Diffstat (limited to 'contrib/ffmpeg/libavcodec/mpegvideo_parser.c')
-rw-r--r--contrib/ffmpeg/libavcodec/mpegvideo_parser.c180
1 files changed, 0 insertions, 180 deletions
diff --git a/contrib/ffmpeg/libavcodec/mpegvideo_parser.c b/contrib/ffmpeg/libavcodec/mpegvideo_parser.c
deleted file mode 100644
index a7ce09d4c..000000000
--- a/contrib/ffmpeg/libavcodec/mpegvideo_parser.c
+++ /dev/null
@@ -1,180 +0,0 @@
-/*
- * MPEG1 / MPEG2 video parser
- * Copyright (c) 2000,2001 Fabrice Bellard.
- * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
- *
- * 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
- */
-
-#include "parser.h"
-#include "mpegvideo.h"
-
-static void mpegvideo_extract_headers(AVCodecParserContext *s,
- AVCodecContext *avctx,
- const uint8_t *buf, int buf_size)
-{
- ParseContext1 *pc = s->priv_data;
- const uint8_t *buf_end;
- uint32_t start_code;
- int frame_rate_index, ext_type, bytes_left;
- int frame_rate_ext_n, frame_rate_ext_d;
- int picture_structure, top_field_first, repeat_first_field, progressive_frame;
- int horiz_size_ext, vert_size_ext, bit_rate_ext;
-//FIXME replace the crap with get_bits()
- s->repeat_pict = 0;
- buf_end = buf + buf_size;
- while (buf < buf_end) {
- start_code= -1;
- buf= ff_find_start_code(buf, buf_end, &start_code);
- bytes_left = buf_end - buf;
- switch(start_code) {
- case PICTURE_START_CODE:
- if (bytes_left >= 2) {
- s->pict_type = (buf[1] >> 3) & 7;
- }
- break;
- case SEQ_START_CODE:
- if (bytes_left >= 7) {
- pc->width = (buf[0] << 4) | (buf[1] >> 4);
- pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
- avcodec_set_dimensions(avctx, pc->width, pc->height);
- frame_rate_index = buf[3] & 0xf;
- pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num;
- pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den;
- avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
- avctx->codec_id = CODEC_ID_MPEG1VIDEO;
- avctx->sub_id = 1;
- }
- break;
- case EXT_START_CODE:
- if (bytes_left >= 1) {
- ext_type = (buf[0] >> 4);
- switch(ext_type) {
- case 0x1: /* sequence extension */
- if (bytes_left >= 6) {
- horiz_size_ext = ((buf[1] & 1) << 1) | (buf[2] >> 7);
- vert_size_ext = (buf[2] >> 5) & 3;
- bit_rate_ext = ((buf[2] & 0x1F)<<7) | (buf[3]>>1);
- frame_rate_ext_n = (buf[5] >> 5) & 3;
- frame_rate_ext_d = (buf[5] & 0x1f);
- pc->progressive_sequence = buf[1] & (1 << 3);
- avctx->has_b_frames= !(buf[5] >> 7);
-
- pc->width |=(horiz_size_ext << 12);
- pc->height |=( vert_size_ext << 12);
- avctx->bit_rate += (bit_rate_ext << 18) * 400;
- avcodec_set_dimensions(avctx, pc->width, pc->height);
- avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1);
- avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
- avctx->codec_id = CODEC_ID_MPEG2VIDEO;
- avctx->sub_id = 2; /* forces MPEG2 */
- }
- break;
- case 0x8: /* picture coding extension */
- if (bytes_left >= 5) {
- picture_structure = buf[2]&3;
- top_field_first = buf[3] & (1 << 7);
- repeat_first_field = buf[3] & (1 << 1);
- progressive_frame = buf[4] & (1 << 7);
-
- /* check if we must repeat the frame */
- if (repeat_first_field) {
- if (pc->progressive_sequence) {
- if (top_field_first)
- s->repeat_pict = 4;
- else
- s->repeat_pict = 2;
- } else if (progressive_frame) {
- s->repeat_pict = 1;
- }
- }
- }
- break;
- }
- }
- break;
- case -1:
- goto the_end;
- default:
- /* we stop parsing when we encounter a slice. It ensures
- that this function takes a negligible amount of time */
- if (start_code >= SLICE_MIN_START_CODE &&
- start_code <= SLICE_MAX_START_CODE)
- goto the_end;
- break;
- }
- }
- the_end: ;
-}
-
-static int mpegvideo_parse(AVCodecParserContext *s,
- AVCodecContext *avctx,
- const uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size)
-{
- ParseContext1 *pc1 = s->priv_data;
- ParseContext *pc= &pc1->pc;
- int next;
-
- if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
- next= buf_size;
- }else{
- next= ff_mpeg1_find_frame_end(pc, buf, buf_size);
-
- if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
- *poutbuf = NULL;
- *poutbuf_size = 0;
- return buf_size;
- }
-
- }
- /* we have a full frame : we just parse the first few MPEG headers
- to have the full timing information. The time take by this
- function should be negligible for uncorrupted streams */
- mpegvideo_extract_headers(s, avctx, buf, buf_size);
-#if 0
- printf("pict_type=%d frame_rate=%0.3f repeat_pict=%d\n",
- s->pict_type, (double)avctx->time_base.den / avctx->time_base.num, s->repeat_pict);
-#endif
-
- *poutbuf = buf;
- *poutbuf_size = buf_size;
- return next;
-}
-
-static int mpegvideo_split(AVCodecContext *avctx,
- const uint8_t *buf, int buf_size)
-{
- int i;
- uint32_t state= -1;
-
- for(i=0; i<buf_size; i++){
- state= (state<<8) | buf[i];
- if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100)
- return i-3;
- }
- return 0;
-}
-
-AVCodecParser mpegvideo_parser = {
- { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO },
- sizeof(ParseContext1),
- NULL,
- mpegvideo_parse,
- ff_parse1_close,
- mpegvideo_split,
-};
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