LCOV - code coverage report
Current view: top level - libavformat - rawvideodec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 24 28 85.7 %
Date: 2017-12-13 02:34:56 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * RAW video demuxer
       3             :  * Copyright (c) 2001 Fabrice Bellard
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/imgutils.h"
      23             : #include "libavutil/parseutils.h"
      24             : #include "libavutil/pixdesc.h"
      25             : #include "libavutil/opt.h"
      26             : #include "internal.h"
      27             : #include "avformat.h"
      28             : 
      29             : typedef struct RawVideoDemuxerContext {
      30             :     const AVClass *class;     /**< Class for private options. */
      31             :     int width, height;        /**< Integers describing video size, set by a private option. */
      32             :     char *pixel_format;       /**< Set by a private option. */
      33             :     AVRational framerate;     /**< AVRational describing framerate, set by a private option. */
      34             : } RawVideoDemuxerContext;
      35             : 
      36             : 
      37         468 : static int rawvideo_read_header(AVFormatContext *ctx)
      38             : {
      39         468 :     RawVideoDemuxerContext *s = ctx->priv_data;
      40             :     enum AVPixelFormat pix_fmt;
      41             :     AVStream *st;
      42             :     int packet_size;
      43             : 
      44         468 :     st = avformat_new_stream(ctx, NULL);
      45         468 :     if (!st)
      46           0 :         return AVERROR(ENOMEM);
      47             : 
      48         468 :     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
      49             : 
      50         468 :     st->codecpar->codec_id = ctx->iformat->raw_codec_id;
      51             : 
      52         468 :     if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
      53           0 :         av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
      54             :                s->pixel_format);
      55           0 :         return AVERROR(EINVAL);
      56             :     }
      57             : 
      58         468 :     avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
      59             : 
      60         468 :     st->codecpar->width  = s->width;
      61         468 :     st->codecpar->height = s->height;
      62         468 :     st->codecpar->format = pix_fmt;
      63         468 :     packet_size = av_image_get_buffer_size(st->codecpar->format, s->width, s->height, 1);
      64         468 :     if (packet_size < 0)
      65           0 :         return packet_size;
      66         468 :     ctx->packet_size = packet_size;
      67         468 :     st->codecpar->bit_rate = av_rescale_q(ctx->packet_size,
      68         468 :                                        (AVRational){8,1}, st->time_base);
      69             : 
      70         468 :     return 0;
      71             : }
      72             : 
      73             : 
      74       18674 : static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
      75             : {
      76             :     int ret;
      77             : 
      78       18674 :     ret = av_get_packet(s->pb, pkt, s->packet_size);
      79       18674 :     pkt->pts = pkt->dts = pkt->pos / s->packet_size;
      80             : 
      81       18674 :     pkt->stream_index = 0;
      82       18674 :     if (ret < 0)
      83         378 :         return ret;
      84       18296 :     return 0;
      85             : }
      86             : 
      87             : #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
      88             : #define DEC AV_OPT_FLAG_DECODING_PARAM
      89             : static const AVOption rawvideo_options[] = {
      90             :     { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
      91             :     { "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
      92             :     { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
      93             :     { NULL },
      94             : };
      95             : 
      96             : static const AVClass rawvideo_demuxer_class = {
      97             :     .class_name = "rawvideo demuxer",
      98             :     .item_name  = av_default_item_name,
      99             :     .option     = rawvideo_options,
     100             :     .version    = LIBAVUTIL_VERSION_INT,
     101             : };
     102             : 
     103             : AVInputFormat ff_rawvideo_demuxer = {
     104             :     .name           = "rawvideo",
     105             :     .long_name      = NULL_IF_CONFIG_SMALL("raw video"),
     106             :     .priv_data_size = sizeof(RawVideoDemuxerContext),
     107             :     .read_header    = rawvideo_read_header,
     108             :     .read_packet    = rawvideo_read_packet,
     109             :     .flags          = AVFMT_GENERIC_INDEX,
     110             :     .extensions     = "yuv,cif,qcif,rgb",
     111             :     .raw_codec_id   = AV_CODEC_ID_RAWVIDEO,
     112             :     .priv_class     = &rawvideo_demuxer_class,
     113             : };

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