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rawvideo: use a specific read_header 

ff_raw_read_header is used only for this demuxer for video.
This commit is contained in:
Luca Barbato 2012-10-24 14:18:49 +02:00
parent 2a91ada828
commit 42c26a4864
2 changed files with 62 additions and 8 deletions
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2
libavformat/Makefile
View File

@ -239,7 +239,7 @@ OBJS-$(CONFIG_PMP_DEMUXER) += pmpdec.o
OBJS-$(CONFIG_PVA_DEMUXER) += pva.o
OBJS-$(CONFIG_QCP_DEMUXER) += qcp.o
OBJS-$(CONFIG_R3D_DEMUXER) += r3d.o
OBJS-$(CONFIG_RAWVIDEO_DEMUXER) += rawvideodec.o rawdec.o
OBJS-$(CONFIG_RAWVIDEO_DEMUXER) += rawvideodec.o
OBJS-$(CONFIG_RAWVIDEO_MUXER) += rawenc.o
OBJS-$(CONFIG_RL2_DEMUXER) += rl2.o
OBJS-$(CONFIG_RM_DEMUXER) += rmdec.o rm.o rmsipr.o

66
libavformat/rawvideodec.c
View File

@ -19,8 +19,63 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "internal.h"
#include "avformat.h"
#include "rawdec.h"
typedef struct RawVideoDemuxerContext {
const AVClass *class; /**< Class for private options. */
char *video_size; /**< String describing video size, set by a private option. */
char *pixel_format; /**< Set by a private option. */
char *framerate; /**< String describing framerate, set by a private option. */
} RawVideoDemuxerContext;
static int rawvideo_read_header(AVFormatContext *ctx)
{
RawVideoDemuxerContext *s = ctx->priv_data;
int width = 0, height = 0, ret = 0;
enum AVPixelFormat pix_fmt;
AVRational framerate;
AVStream *st;
st = avformat_new_stream(ctx, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = ctx->iformat->raw_codec_id;
if (s->video_size &&
(ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Couldn't parse video size.\n");
return ret;
}
if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
s->pixel_format);
return AVERROR(EINVAL);
}
if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Could not parse framerate: %s.\n",
s->framerate);
return ret;
}
avpriv_set_pts_info(st, 64, framerate.den, framerate.num);
st->codec->width = width;
st->codec->height = height;
st->codec->pix_fmt = pix_fmt;
return 0;
}
static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
{
@ -35,8 +90,7 @@ static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
return -1;
ret = av_get_packet(s->pb, pkt, packet_size);
pkt->pts=
pkt->dts= pkt->pos / packet_size;
pkt->pts = pkt->dts = pkt->pos / packet_size;
pkt->stream_index = 0;
if (ret < 0)
@ -44,7 +98,7 @@ static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
return 0;
}
#define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
#define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption rawvideo_options[] = {
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
@ -63,8 +117,8 @@ static const AVClass rawvideo_demuxer_class = {
AVInputFormat ff_rawvideo_demuxer = {
.name = "rawvideo",
.long_name = NULL_IF_CONFIG_SMALL("raw video"),
.priv_data_size = sizeof(FFRawVideoDemuxerContext),
.read_header = ff_raw_read_header,
.priv_data_size = sizeof(RawVideoDemuxerContext),
.read_header = rawvideo_read_header,
.read_packet = rawvideo_read_packet,
.flags = AVFMT_GENERIC_INDEX,
.extensions = "yuv,cif,qcif,rgb",