mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2025-03-28 20:05:38 +00:00
avprotocol: Port from the URL protocol handler to saner public API
This commit is contained in:
Christiaan Welvaart
Sebastian Dröge
parent
4c46f11d5f
commit
338b147374
5 changed files with 124 additions and 144 deletions
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@ -30,7 +30,6 @@
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libavformat/url.h>
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#include "gstav.h"
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#include "gstavutils.h"
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@ -150,9 +149,6 @@ plugin_init (GstPlugin * plugin)
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gst_ffmpegaudioresample_register (plugin);
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#endif
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ffurl_register_protocol (&gstreamer_protocol, sizeof (URLProtocol));
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ffurl_register_protocol (&gstpipe_protocol, sizeof (URLProtocol));
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/* Now we can return the pointer to the newly created Plugin object. */
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return TRUE;
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}
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@ -26,7 +26,6 @@
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libavformat/url.h>
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#include <gst/gst.h>
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@ -56,10 +55,13 @@ int gst_ffmpeg_avcodec_open (AVCodecContext *avctx, AVCodec *codec);
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int gst_ffmpeg_avcodec_close (AVCodecContext *avctx);
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int gst_ffmpeg_av_find_stream_info(AVFormatContext *ic);
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G_END_DECLS
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int gst_ffmpegdata_open (GstPad * pad, int flags, AVIOContext ** context);
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int gst_ffmpegdata_close (AVIOContext * h);
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typedef struct _GstFFMpegPipe GstFFMpegPipe;
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int gst_ffmpeg_pipe_open (GstFFMpegPipe *ffpipe, int flags, AVIOContext ** context);
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int gst_ffmpeg_pipe_close (AVIOContext * h);
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extern URLProtocol gstreamer_protocol;
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extern URLProtocol gstpipe_protocol;
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G_END_DECLS
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/* use GST_FFMPEG URL_STREAMHEADER with URL_WRONLY if the first
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* buffer should be used as streamheader property on the pad's caps. */
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@ -332,8 +332,11 @@ gst_ffmpegdemux_close (GstFFMpegDemux * demux)
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demux->audiopads = 0;
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/* close demuxer context from ffmpeg */
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av_close_input_file (demux->context);
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demux->context = NULL;
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if (demux->seekable)
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gst_ffmpegdata_close (demux->context->pb);
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else
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gst_ffmpeg_pipe_close (demux->context->pb);
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avformat_close_input (&demux->context);
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GST_OBJECT_LOCK (demux);
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demux->opened = FALSE;
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@ -1115,9 +1118,9 @@ gst_ffmpegdemux_read_tags (GstFFMpegDemux * demux)
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static gboolean
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gst_ffmpegdemux_open (GstFFMpegDemux * demux)
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{
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AVIOContext *iocontext = NULL;
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GstFFMpegDemuxClass *oclass =
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(GstFFMpegDemuxClass *) G_OBJECT_GET_CLASS (demux);
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gchar *location;
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gint res, n_streams, i;
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#if 0
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/* Re-enable once converted to new AVMetaData API
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@ -1133,15 +1136,14 @@ gst_ffmpegdemux_open (GstFFMpegDemux * demux)
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/* open via our input protocol hack */
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if (demux->seekable)
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location = g_strdup_printf ("gstreamer://%p", demux->sinkpad);
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res = gst_ffmpegdata_open (demux->sinkpad, AVIO_FLAG_READ, &iocontext);
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else
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location = g_strdup_printf ("gstpipe://%p", &demux->ffpipe);
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GST_DEBUG_OBJECT (demux, "about to call av_open_input_file %s", location);
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res = gst_ffmpeg_pipe_open (&demux->ffpipe, AVIO_FLAG_READ, &iocontext);
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res = avformat_open_input (&demux->context, location,
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oclass->in_plugin, NULL);
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demux->context = avformat_alloc_context ();
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demux->context->pb = iocontext;
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res = avformat_open_input (&demux->context, NULL, oclass->in_plugin, NULL);
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g_free (location);
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GST_DEBUG_OBJECT (demux, "av_open_input returned %d", res);
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if (res < 0)
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goto open_failed;
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@ -24,6 +24,7 @@
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#include <string.h>
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#include <libavformat/avformat.h>
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#include <libavutil/opt.h>
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#include <gst/gst.h>
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#include <gst/base/gstcollectpads.h>
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@ -58,6 +59,7 @@ struct _GstFFMpegMux
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/* event_function is the collectpads default eventfunction */
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GstPadEventFunction event_function;
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int max_delay;
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int preload;
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};
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typedef struct _GstFFMpegMuxClass GstFFMpegMuxClass;
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@ -294,7 +296,7 @@ gst_ffmpegmux_class_init (GstFFMpegMuxClass * klass)
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g_object_class_install_property (gobject_class, PROP_PRELOAD,
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g_param_spec_int ("preload", "preload",
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"Set the initial demux-decode delay (in microseconds) (DEPRECATED)",
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"Set the initial demux-decode delay (in microseconds)",
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0, G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_MAXDELAY,
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@ -325,9 +327,6 @@ gst_ffmpegmux_init (GstFFMpegMux * ffmpegmux, GstFFMpegMuxClass * g_class)
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ffmpegmux->context = g_new0 (AVFormatContext, 1);
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ffmpegmux->context->oformat = oclass->in_plugin;
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ffmpegmux->context->nb_streams = 0;
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g_snprintf (ffmpegmux->context->filename,
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sizeof (ffmpegmux->context->filename),
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"gstreamer://%p", ffmpegmux->srcpad);
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ffmpegmux->opened = FALSE;
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ffmpegmux->videopads = 0;
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@ -345,6 +344,7 @@ gst_ffmpegmux_set_property (GObject * object, guint prop_id,
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switch (prop_id) {
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case PROP_PRELOAD:
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src->preload = g_value_get_int (value);
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break;
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case PROP_MAXDELAY:
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src->max_delay = g_value_get_int (value);
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@ -365,6 +365,7 @@ gst_ffmpegmux_get_property (GObject * object, guint prop_id, GValue * value,
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switch (prop_id) {
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case PROP_PRELOAD:
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g_value_set_int (value, src->preload);
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break;
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case PROP_MAXDELAY:
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g_value_set_int (value, src->max_delay);
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@ -470,6 +471,7 @@ gst_ffmpegmux_setcaps (GstPad * pad, GstCaps * caps)
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collect_pad = (GstFFMpegMuxPad *) gst_pad_get_element_private (pad);
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st = ffmpegmux->context->streams[collect_pad->padnum];
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av_opt_set_int (&ffmpegmux->context, "preload", ffmpegmux->preload, 0);
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ffmpegmux->context->max_delay = ffmpegmux->max_delay;
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/* for the format-specific guesses, we'll go to
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@ -637,8 +639,8 @@ gst_ffmpegmux_collected (GstCollectPads * pads, gpointer user_data)
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open_flags |= GST_FFMPEG_URL_STREAMHEADER;
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}
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if (avio_open (&ffmpegmux->context->pb,
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ffmpegmux->context->filename, open_flags) < 0) {
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if (gst_ffmpegdata_open (ffmpegmux->srcpad, open_flags,
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&ffmpegmux->context->pb) < 0) {
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GST_ELEMENT_ERROR (ffmpegmux, LIBRARY, TOO_LAZY, (NULL),
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("Failed to open stream context in avmux"));
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return GST_FLOW_ERROR;
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@ -763,7 +765,7 @@ gst_ffmpegmux_collected (GstCollectPads * pads, gpointer user_data)
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av_write_trailer (ffmpegmux->context);
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ffmpegmux->opened = FALSE;
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avio_flush (ffmpegmux->context->pb);
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avio_close (ffmpegmux->context->pb);
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gst_ffmpegdata_close (ffmpegmux->context->pb);
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gst_pad_push_event (ffmpegmux->srcpad, gst_event_new_eos ());
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return GST_FLOW_EOS;
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}
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@ -801,7 +803,7 @@ gst_ffmpegmux_change_state (GstElement * element, GstStateChange transition)
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gst_tag_setter_reset_tags (GST_TAG_SETTER (ffmpegmux));
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if (ffmpegmux->opened) {
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ffmpegmux->opened = FALSE;
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avio_close (ffmpegmux->context->pb);
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gst_ffmpegdata_close (ffmpegmux->context->pb);
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}
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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@ -25,7 +25,6 @@
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#include <errno.h>
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#include <libavformat/avformat.h>
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#include <libavformat/url.h>
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#include <gst/gst.h>
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@ -44,61 +43,14 @@ struct _GstProtocolInfo
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};
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static int
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gst_ffmpegdata_open (URLContext * h, const char *filename, int flags)
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{
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GstProtocolInfo *info;
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GstPad *pad;
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GST_LOG ("Opening %s", filename);
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info = g_new0 (GstProtocolInfo, 1);
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info->set_streamheader = flags & GST_FFMPEG_URL_STREAMHEADER;
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flags &= ~GST_FFMPEG_URL_STREAMHEADER;
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h->flags &= ~GST_FFMPEG_URL_STREAMHEADER;
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/* we don't support R/W together */
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if ((flags & AVIO_FLAG_WRITE) && (flags & AVIO_FLAG_READ)) {
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GST_WARNING ("Only read-only or write-only are supported");
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return -EINVAL;
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}
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if (sscanf (&filename[12], "%p", &pad) != 1) {
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GST_WARNING ("could not decode pad from %s", filename);
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return -EIO;
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}
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/* make sure we're a pad and that we're of the right type */
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g_return_val_if_fail (GST_IS_PAD (pad), -EINVAL);
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if ((flags & AVIO_FLAG_READ)) {
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g_return_val_if_fail (GST_PAD_IS_SINK (pad), -EINVAL);
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}
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if ((flags & AVIO_FLAG_WRITE)) {
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g_return_val_if_fail (GST_PAD_IS_SRC (pad), -EINVAL);
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}
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info->eos = FALSE;
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info->pad = pad;
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info->offset = 0;
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h->priv_data = (void *) info;
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h->is_streamed = FALSE;
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h->max_packet_size = 0;
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return 0;
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}
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static int
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gst_ffmpegdata_peek (URLContext * h, unsigned char *buf, int size)
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gst_ffmpegdata_peek (void *priv_data, unsigned char *buf, int size)
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{
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GstProtocolInfo *info;
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GstBuffer *inbuf = NULL;
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GstFlowReturn ret;
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int total = 0;
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g_return_val_if_fail ((h->flags & AVIO_FLAG_READ), AVERROR (EIO));
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info = (GstProtocolInfo *) h->priv_data;
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info = (GstProtocolInfo *) priv_data;
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GST_DEBUG ("Pulling %d bytes at position %" G_GUINT64_FORMAT, size,
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info->offset);
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@ -130,17 +82,17 @@ gst_ffmpegdata_peek (URLContext * h, unsigned char *buf, int size)
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}
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static int
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gst_ffmpegdata_read (URLContext * h, unsigned char *buf, int size)
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gst_ffmpegdata_read (void *priv_data, unsigned char *buf, int size)
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{
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gint res;
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GstProtocolInfo *info;
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info = (GstProtocolInfo *) h->priv_data;
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info = (GstProtocolInfo *) priv_data;
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GST_DEBUG ("Reading %d bytes of data at position %" G_GUINT64_FORMAT, size,
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info->offset);
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res = gst_ffmpegdata_peek (h, buf, size);
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res = gst_ffmpegdata_peek (priv_data, buf, size);
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if (res >= 0)
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info->offset += res;
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@ -150,15 +102,13 @@ gst_ffmpegdata_read (URLContext * h, unsigned char *buf, int size)
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}
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static int
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gst_ffmpegdata_write (URLContext * h, const unsigned char *buf, int size)
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gst_ffmpegdata_write (void *priv_data, uint8_t * buf, int size)
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{
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GstProtocolInfo *info;
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GstBuffer *outbuf;
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GST_DEBUG ("Writing %d bytes", size);
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info = (GstProtocolInfo *) h->priv_data;
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g_return_val_if_fail ((h->flags & AVIO_FLAG_WRITE), -EIO);
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info = (GstProtocolInfo *) priv_data;
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/* create buffer and push data further */
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outbuf = gst_buffer_new_and_alloc (size);
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@ -173,7 +123,7 @@ gst_ffmpegdata_write (URLContext * h, const unsigned char *buf, int size)
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}
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static int64_t
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gst_ffmpegdata_seek (URLContext * h, int64_t pos, int whence)
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gst_ffmpegdata_seek (void *priv_data, int64_t pos, int whence)
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{
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GstProtocolInfo *info;
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guint64 newpos = 0, oldpos;
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@ -181,10 +131,11 @@ gst_ffmpegdata_seek (URLContext * h, int64_t pos, int whence)
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GST_DEBUG ("Seeking to %" G_GINT64_FORMAT ", whence=%d",
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(gint64) pos, whence);
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info = (GstProtocolInfo *) h->priv_data;
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info = (GstProtocolInfo *) priv_data;
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/* TODO : if we are push-based, we need to return sensible info */
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if ((h->flags & AVIO_FLAG_READ)) {
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if (GST_PAD_IS_SINK (info->pad)) {
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/* sinkpad */
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switch (whence) {
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case SEEK_SET:
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@ -214,9 +165,7 @@ gst_ffmpegdata_seek (URLContext * h, int64_t pos, int whence)
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/* FIXME : implement case for push-based behaviour */
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if (whence != AVSEEK_SIZE)
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info->offset = newpos;
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}
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if ((h->flags & AVIO_FLAG_WRITE)) {
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} else if (GST_PAD_IS_SRC (info->pad)) {
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GstSegment segment;
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oldpos = info->offset;
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@ -242,6 +191,8 @@ gst_ffmpegdata_seek (URLContext * h, int64_t pos, int whence)
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segment.time = newpos;
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gst_pad_push_event (info->pad, gst_event_new_segment (&segment));
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}
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} else {
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g_assert_not_reached ();
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}
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GST_DEBUG ("Now at offset %" G_GUINT64_FORMAT " (returning %" G_GUINT64_FORMAT
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@ -249,79 +200,90 @@ gst_ffmpegdata_seek (URLContext * h, int64_t pos, int whence)
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return newpos;
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}
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static int
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gst_ffmpegdata_close (URLContext * h)
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int
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gst_ffmpegdata_close (AVIOContext * h)
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{
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GstProtocolInfo *info;
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info = (GstProtocolInfo *) h->priv_data;
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info = (GstProtocolInfo *) h->opaque;
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if (info == NULL)
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return 0;
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GST_LOG ("Closing file");
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if ((h->flags & AVIO_FLAG_WRITE)) {
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if (GST_PAD_IS_SRC (info->pad)) {
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/* send EOS - that closes down the stream */
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gst_pad_push_event (info->pad, gst_event_new_eos ());
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}
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/* clean up data */
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g_free (info);
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h->priv_data = NULL;
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h->opaque = NULL;
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av_freep (&h->buffer);
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av_free (h);
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return 0;
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}
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int
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gst_ffmpegdata_open (GstPad * pad, int flags, AVIOContext ** context)
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{
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GstProtocolInfo *info;
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static const int buffer_size = 4096;
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unsigned char *buffer = NULL;
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URLProtocol gstreamer_protocol = {
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/*.name = */ "gstreamer",
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/*.url_open = */ gst_ffmpegdata_open,
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/*.url_open2 = */ NULL,
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/*.url_read = */ gst_ffmpegdata_read,
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/*.url_write = */ gst_ffmpegdata_write,
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/*.url_seek = */ gst_ffmpegdata_seek,
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/*.url_close = */ gst_ffmpegdata_close,
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};
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info = g_new0 (GstProtocolInfo, 1);
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info->set_streamheader = flags & GST_FFMPEG_URL_STREAMHEADER;
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flags &= ~GST_FFMPEG_URL_STREAMHEADER;
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/* we don't support R/W together */
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if ((flags & AVIO_FLAG_WRITE) && (flags & AVIO_FLAG_READ)) {
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GST_WARNING ("Only read-only or write-only are supported");
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return -EINVAL;
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}
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/* make sure we're a pad and that we're of the right type */
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g_return_val_if_fail (GST_IS_PAD (pad), -EINVAL);
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if ((flags & AVIO_FLAG_READ))
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g_return_val_if_fail (GST_PAD_IS_SINK (pad), -EINVAL);
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if ((flags & AVIO_FLAG_WRITE))
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g_return_val_if_fail (GST_PAD_IS_SRC (pad), -EINVAL);
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info->eos = FALSE;
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info->pad = pad;
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info->offset = 0;
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|
||||
buffer = av_malloc (buffer_size);
|
||||
if (buffer == NULL) {
|
||||
GST_WARNING ("Failed to allocate buffer");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
*context =
|
||||
avio_alloc_context (buffer, buffer_size, flags, (void *) info,
|
||||
gst_ffmpegdata_read, gst_ffmpegdata_write, gst_ffmpegdata_seek);
|
||||
(*context)->seekable = AVIO_SEEKABLE_NORMAL;
|
||||
if (!(flags & AVIO_FLAG_WRITE)) {
|
||||
(*context)->buf_ptr = (*context)->buf_end;
|
||||
(*context)->write_flag = 0;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* specialized protocol for cross-thread pushing,
|
||||
* based on ffmpeg's pipe protocol */
|
||||
|
||||
static int
|
||||
gst_ffmpeg_pipe_open (URLContext * h, const char *filename, int flags)
|
||||
{
|
||||
GstFFMpegPipe *ffpipe;
|
||||
|
||||
GST_LOG ("Opening %s", filename);
|
||||
|
||||
/* we don't support W together */
|
||||
if ((flags & AVIO_FLAG_WRITE)) {
|
||||
GST_WARNING ("Only read-only is supported");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (sscanf (&filename[10], "%p", &ffpipe) != 1) {
|
||||
GST_WARNING ("could not decode pipe info from %s", filename);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* sanity check */
|
||||
g_return_val_if_fail (GST_IS_ADAPTER (ffpipe->adapter), -EINVAL);
|
||||
|
||||
h->priv_data = (void *) ffpipe;
|
||||
h->is_streamed = TRUE;
|
||||
h->max_packet_size = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
gst_ffmpeg_pipe_read (URLContext * h, unsigned char *buf, int size)
|
||||
gst_ffmpeg_pipe_read (void *priv_data, uint8_t * buf, int size)
|
||||
{
|
||||
GstFFMpegPipe *ffpipe;
|
||||
guint available;
|
||||
|
||||
ffpipe = (GstFFMpegPipe *) h->priv_data;
|
||||
ffpipe = (GstFFMpegPipe *) priv_data;
|
||||
|
||||
GST_LOG ("requested size %d", size);
|
||||
|
||||
|
|
@ -351,22 +313,38 @@ gst_ffmpeg_pipe_read (URLContext * h, unsigned char *buf, int size)
|
|||
return size;
|
||||
}
|
||||
|
||||
static int
|
||||
gst_ffmpeg_pipe_close (URLContext * h)
|
||||
int
|
||||
gst_ffmpeg_pipe_close (AVIOContext * h)
|
||||
{
|
||||
GST_LOG ("Closing pipe");
|
||||
|
||||
h->priv_data = NULL;
|
||||
h->opaque = NULL;
|
||||
av_freep (&h->buffer);
|
||||
av_free (h);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
URLProtocol gstpipe_protocol = {
|
||||
"gstpipe",
|
||||
gst_ffmpeg_pipe_open,
|
||||
NULL,
|
||||
gst_ffmpeg_pipe_read,
|
||||
NULL,
|
||||
NULL,
|
||||
gst_ffmpeg_pipe_close,
|
||||
};
|
||||
int
|
||||
gst_ffmpeg_pipe_open (GstFFMpegPipe * ffpipe, int flags, AVIOContext ** context)
|
||||
{
|
||||
static const int buffer_size = 4096;
|
||||
unsigned char *buffer = NULL;
|
||||
|
||||
/* sanity check */
|
||||
g_return_val_if_fail (GST_IS_ADAPTER (ffpipe->adapter), -EINVAL);
|
||||
|
||||
buffer = av_malloc (buffer_size);
|
||||
if (buffer == NULL) {
|
||||
GST_WARNING ("Failed to allocate buffer");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
*context =
|
||||
avio_alloc_context (buffer, buffer_size, 0, (void *) ffpipe,
|
||||
gst_ffmpeg_pipe_read, NULL, NULL);
|
||||
(*context)->seekable = 0;
|
||||
(*context)->buf_ptr = (*context)->buf_end;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue