Browse code

rawvideo: use a specific read_header

ff_raw_read_header is used only for this demuxer for video.

Luca Barbato authored on 2012/10/24 21:18:49
Showing 2 changed files
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@@ -239,7 +239,7 @@ OBJS-$(CONFIG_PMP_DEMUXER)               += pmpdec.o
239 239
 OBJS-$(CONFIG_PVA_DEMUXER)               += pva.o
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 OBJS-$(CONFIG_QCP_DEMUXER)               += qcp.o
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 OBJS-$(CONFIG_R3D_DEMUXER)               += r3d.o
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-OBJS-$(CONFIG_RAWVIDEO_DEMUXER)          += rawvideodec.o rawdec.o
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+OBJS-$(CONFIG_RAWVIDEO_DEMUXER)          += rawvideodec.o
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 OBJS-$(CONFIG_RAWVIDEO_MUXER)            += rawenc.o
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 OBJS-$(CONFIG_RL2_DEMUXER)               += rl2.o
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 OBJS-$(CONFIG_RM_DEMUXER)                += rmdec.o rm.o rmsipr.o
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@@ -19,8 +19,63 @@
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  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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  */
21 21
 
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+#include "libavutil/parseutils.h"
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+#include "libavutil/pixdesc.h"
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+#include "libavutil/opt.h"
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+#include "internal.h"
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 #include "avformat.h"
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-#include "rawdec.h"
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+
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+typedef struct RawVideoDemuxerContext {
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+    const AVClass *class;     /**< Class for private options. */
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+    char *video_size;         /**< String describing video size, set by a private option. */
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+    char *pixel_format;       /**< Set by a private option. */
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+    char *framerate;          /**< String describing framerate, set by a private option. */
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+} RawVideoDemuxerContext;
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+
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+
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+static int rawvideo_read_header(AVFormatContext *ctx)
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+{
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+    RawVideoDemuxerContext *s = ctx->priv_data;
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+    int width = 0, height = 0, ret = 0;
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+    enum AVPixelFormat pix_fmt;
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+    AVRational framerate;
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+    AVStream *st;
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+
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+    st = avformat_new_stream(ctx, NULL);
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+    if (!st)
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+        return AVERROR(ENOMEM);
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+
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+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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+
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+    st->codec->codec_id = ctx->iformat->raw_codec_id;
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+
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+    if (s->video_size &&
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+        (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
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+        av_log(ctx, AV_LOG_ERROR, "Couldn't parse video size.\n");
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+        return ret;
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+    }
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+
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+    if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
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+        av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
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+               s->pixel_format);
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+        return AVERROR(EINVAL);
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+    }
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+
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+    if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
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+        av_log(ctx, AV_LOG_ERROR, "Could not parse framerate: %s.\n",
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+               s->framerate);
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+        return ret;
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+    }
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+
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+    avpriv_set_pts_info(st, 64, framerate.den, framerate.num);
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+
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+    st->codec->width  = width;
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+    st->codec->height = height;
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+    st->codec->pix_fmt = pix_fmt;
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+
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+    return 0;
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+}
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+
24 79
 
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 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
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 {
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@@ -34,9 +89,8 @@ static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
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     if (packet_size < 0)
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         return -1;
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-    ret= av_get_packet(s->pb, pkt, packet_size);
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-    pkt->pts=
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-    pkt->dts= pkt->pos / packet_size;
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+    ret = av_get_packet(s->pb, pkt, packet_size);
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+    pkt->pts = pkt->dts = pkt->pos / packet_size;
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     pkt->stream_index = 0;
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     if (ret < 0)
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@@ -44,7 +98,7 @@ static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
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     return 0;
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 }
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-#define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
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+#define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
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 #define DEC AV_OPT_FLAG_DECODING_PARAM
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 static const AVOption rawvideo_options[] = {
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     { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
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@@ -63,8 +117,8 @@ static const AVClass rawvideo_demuxer_class = {
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 AVInputFormat ff_rawvideo_demuxer = {
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     .name           = "rawvideo",
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     .long_name      = NULL_IF_CONFIG_SMALL("raw video"),
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-    .priv_data_size = sizeof(FFRawVideoDemuxerContext),
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-    .read_header    = ff_raw_read_header,
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+    .priv_data_size = sizeof(RawVideoDemuxerContext),
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+    .read_header    = rawvideo_read_header,
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     .read_packet    = rawvideo_read_packet,
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     .flags          = AVFMT_GENERIC_INDEX,
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     .extensions     = "yuv,cif,qcif,rgb",