implement new grabbing interface, as described here:
ttp://thread.gmane.org/gmane.comp.video.ffmpeg.devel/42920 patch by Ramiro Polla % ramiro A lisha P ufsc P br % Original thread: Date: Jan 31, 2007 8:56 PM Subject: [Ffmpeg-devel] [PATCH] New grabbing interface Originally committed as revision 7983 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ramiro Polla
Guillaume Poirier
parent
2012121363
commit
cc58300e30
11 changed files with 25 additions and 212 deletions
148
ffmpeg.c
148
ffmpeg.c
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@ -181,22 +181,9 @@ static int video_global_header = 0;
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static int rate_emu = 0;
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#ifdef CONFIG_BKTR
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static const char *video_grab_format = "bktr";
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#else
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#ifdef CONFIG_VIDEO4LINUX2
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static const char *video_grab_format = "video4linux2";
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#else
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static const char *video_grab_format = "video4linux";
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#endif
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#endif
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static char *video_device = NULL;
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static char *grab_device = NULL;
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static int video_channel = 0;
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static char *video_standard = "ntsc";
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static const char *audio_grab_format = "audio_device";
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static char *audio_device = NULL;
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static int audio_volume = 256;
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static int using_stdin = 0;
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@ -2357,16 +2344,6 @@ static void opt_audio_channels(const char *arg)
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audio_channels = atoi(arg);
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}
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static void opt_video_device(const char *arg)
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{
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video_device = av_strdup(arg);
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}
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static void opt_grab_device(const char *arg)
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{
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grab_device = av_strdup(arg);
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}
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static void opt_video_channel(const char *arg)
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{
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video_channel = strtol(arg, NULL, 0);
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@ -2377,11 +2354,6 @@ static void opt_video_standard(const char *arg)
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video_standard = av_strdup(arg);
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}
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static void opt_audio_device(const char *arg)
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{
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audio_device = av_strdup(arg);
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}
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static void opt_codec(int *pstream_copy, int *pcodec_id,
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int codec_type, const char *arg)
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{
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@ -2573,7 +2545,6 @@ static void opt_input_file(const char *filename)
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ap->width = frame_width + frame_padleft + frame_padright;
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ap->height = frame_height + frame_padtop + frame_padbottom;
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ap->pix_fmt = frame_pix_fmt;
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ap->device = grab_device;
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ap->channel = video_channel;
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ap->standard = video_standard;
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ap->video_codec_id = video_codec_id;
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@ -2699,18 +2670,11 @@ static void opt_input_file(const char *filename)
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file_iformat = NULL;
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file_oformat = NULL;
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grab_device = NULL;
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video_channel = 0;
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rate_emu = 0;
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}
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static void opt_grab(const char *arg)
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{
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file_iformat = av_find_input_format(arg);
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opt_input_file("");
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}
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static void check_audio_video_inputs(int *has_video_ptr, int *has_audio_ptr)
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{
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int has_video, has_audio, i, j;
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@ -3179,107 +3143,6 @@ static void opt_output_file(const char *filename)
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file_iformat = NULL;
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}
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/* prepare dummy protocols for grab */
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static void prepare_grab(void)
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{
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int has_video, has_audio, i, j;
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AVFormatContext *oc;
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AVFormatContext *ic;
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AVFormatParameters vp1, *vp = &vp1;
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AVFormatParameters ap1, *ap = &ap1;
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/* see if audio/video inputs are needed */
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has_video = 0;
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has_audio = 0;
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memset(ap, 0, sizeof(*ap));
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memset(vp, 0, sizeof(*vp));
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vp->time_base.num= 1;
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for(j=0;j<nb_output_files;j++) {
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oc = output_files[j];
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for(i=0;i<oc->nb_streams;i++) {
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AVCodecContext *enc = oc->streams[i]->codec;
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switch(enc->codec_type) {
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case CODEC_TYPE_AUDIO:
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if (enc->sample_rate > ap->sample_rate)
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ap->sample_rate = enc->sample_rate;
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if (enc->channels > ap->channels)
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ap->channels = enc->channels;
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has_audio = 1;
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break;
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case CODEC_TYPE_VIDEO:
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if (enc->width > vp->width)
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vp->width = enc->width;
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if (enc->height > vp->height)
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vp->height = enc->height;
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if (vp->time_base.num*(int64_t)enc->time_base.den > enc->time_base.num*(int64_t)vp->time_base.den){
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vp->time_base = enc->time_base;
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vp->width += frame_leftBand + frame_rightBand;
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vp->width -= (frame_padleft + frame_padright);
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vp->height += frame_topBand + frame_bottomBand;
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vp->height -= (frame_padtop + frame_padbottom);
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}
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has_video = 1;
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break;
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default:
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av_abort();
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}
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}
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}
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if (has_video == 0 && has_audio == 0) {
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fprintf(stderr, "Output file must have at least one audio or video stream\n");
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exit(1);
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}
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if (has_video) {
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AVInputFormat *fmt1;
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#warning FIXME: find a better interface
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if(video_device&&!strncmp(video_device,"x11:",4)) {
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video_grab_format="x11grab";
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}
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fmt1 = av_find_input_format(video_grab_format);
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vp->device = video_device;
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vp->channel = video_channel;
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vp->standard = video_standard;
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vp->pix_fmt = frame_pix_fmt;
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if (av_open_input_file(&ic, "", fmt1, 0, vp) < 0) {
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fprintf(stderr, "Could not find video grab device\n");
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exit(1);
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}
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/* If not enough info to get the stream parameters, we decode the
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first frames to get it. */
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if ((ic->ctx_flags & AVFMTCTX_NOHEADER) && av_find_stream_info(ic) < 0) {
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fprintf(stderr, "Could not find video grab parameters\n");
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exit(1);
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}
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/* by now video grab has one stream */
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ic->streams[0]->r_frame_rate.num = vp->time_base.den;
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ic->streams[0]->r_frame_rate.den = vp->time_base.num;
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input_files[nb_input_files] = ic;
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if (verbose >= 0)
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dump_format(ic, nb_input_files, "", 0);
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nb_input_files++;
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}
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if (has_audio && audio_grab_format) {
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AVInputFormat *fmt1;
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fmt1 = av_find_input_format(audio_grab_format);
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ap->device = audio_device;
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if (av_open_input_file(&ic, "", fmt1, 0, ap) < 0) {
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fprintf(stderr, "Could not find audio grab device\n");
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exit(1);
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}
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input_files[nb_input_files] = ic;
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if (verbose >= 0)
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dump_format(ic, nb_input_files, "", 0);
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nb_input_files++;
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}
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}
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/* same option as mencoder */
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static void opt_pass(const char *pass_str)
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{
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@ -3789,14 +3652,9 @@ const OptionDef options[] = {
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{ "slang", HAS_ARG | OPT_STRING | OPT_SUBTITLE, {(void *)&subtitle_language}, "set the ISO 639 language code (3 letters) of the current subtitle stream" , "code" },
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/* grab options */
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{ "vd", HAS_ARG | OPT_EXPERT | OPT_VIDEO | OPT_GRAB, {(void*)opt_video_device}, "set video grab device", "device" },
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{ "vc", HAS_ARG | OPT_EXPERT | OPT_VIDEO | OPT_GRAB, {(void*)opt_video_channel}, "set video grab channel (DV1394 only)", "channel" },
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{ "tvstd", HAS_ARG | OPT_EXPERT | OPT_VIDEO | OPT_GRAB, {(void*)opt_video_standard}, "set television standard (NTSC, PAL (SECAM))", "standard" },
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{ "ad", HAS_ARG | OPT_EXPERT | OPT_AUDIO | OPT_GRAB, {(void*)opt_audio_device}, "set audio device", "device" },
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/* G.2 grab options */
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{ "grab", HAS_ARG | OPT_EXPERT | OPT_GRAB, {(void*)opt_grab}, "request grabbing using", "format" },
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{ "gd", HAS_ARG | OPT_EXPERT | OPT_VIDEO | OPT_GRAB, {(void*)opt_grab_device}, "set grab device", "device" },
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{ "isync", OPT_BOOL | OPT_EXPERT | OPT_GRAB, {(void*)&input_sync}, "sync read on input", "" },
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/* muxer options */
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{ "muxdelay", OPT_FLOAT | HAS_ARG | OPT_EXPERT, {(void*)&mux_max_delay}, "set the maximum demux-decode delay", "seconds" },
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@ -3928,8 +3786,8 @@ int main(int argc, char **argv)
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}
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if (nb_input_files == 0) {
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input_sync = 1;
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prepare_grab();
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fprintf(stderr, "Must supply at least one input file\n");
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exit(1);
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}
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ti = getutime();
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