X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmpegvideo_parser.c;h=1798f8386f5c8dffeb78e0be67b669aa2268407c;hb=c98c6e18d82a34c7b02d9539d4a79ec3c60fc0b9;hp=215c86c4001b1e23269f6fbf04a4e7fbe78ae4d0;hpb=a4c7a5ea27050a28625eabf1ba98cfef9ac6620d;p=ffmpeg diff --git a/libavcodec/mpegvideo_parser.c b/libavcodec/mpegvideo_parser.c index 215c86c4001..1798f8386f5 100644 --- a/libavcodec/mpegvideo_parser.c +++ b/libavcodec/mpegvideo_parser.c @@ -3,20 +3,20 @@ * Copyright (c) 2000,2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -28,18 +28,19 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s, const uint8_t *buf, int buf_size) { ParseContext1 *pc = s->priv_data; - const uint8_t *buf_end; + const uint8_t *buf_end = buf + buf_size; 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 top_field_first, repeat_first_field, progressive_frame; int horiz_size_ext, vert_size_ext, bit_rate_ext; + int did_set_size=0; //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); + buf= avpriv_mpv_find_start_code(buf, buf_end, &start_code); bytes_left = buf_end - buf; switch(start_code) { case PICTURE_START_CODE: @@ -51,10 +52,13 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s, 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); + if(!avctx->width || !avctx->height || !avctx->coded_width || !avctx->coded_height){ + avcodec_set_dimensions(avctx, pc->width, pc->height); + did_set_size=1; + } 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; + pc->frame_rate.den = avctx->time_base.den = avpriv_frame_rate_tab[frame_rate_index].num; + pc->frame_rate.num = avctx->time_base.num = avpriv_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; @@ -77,7 +81,8 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s, 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); + if(did_set_size) + avcodec_set_dimensions(avctx, pc->width, pc->height); avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1) * 2; avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1); avctx->codec_id = CODEC_ID_MPEG2VIDEO; @@ -86,7 +91,6 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s, 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); @@ -147,10 +151,8 @@ static int mpegvideo_parse(AVCodecParserContext *s, 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 + av_dlog(NULL, "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); *poutbuf = buf; *poutbuf_size = buf_size; @@ -171,10 +173,10 @@ static int mpegvideo_split(AVCodecContext *avctx, return 0; } -AVCodecParser mpegvideo_parser = { - { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO }, - sizeof(ParseContext1), - NULL, - mpegvideo_parse, - ff_parse1_close, +AVCodecParser ff_mpegvideo_parser = { + .codec_ids = { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO }, + .priv_data_size = sizeof(ParseContext1), + .parser_parse = mpegvideo_parse, + .parser_close = ff_parse1_close, + .split = mpegvideo_split, };