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gstreamer/gst/avi/gstavimux.c
Mark Nauwelaerts 67e168aef4 collectpads2: rename to collectpads
2012-04-17 15:14:27 +02:00

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/* AVI muxer plugin for GStreamer
* Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
* (C) 2006 Mark Nauwelaerts <manauw@skynet.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* based on:
* - the old avimuxer (by Wim Taymans)
* - xawtv's aviwriter (by Gerd Knorr)
* - mjpegtools' avilib (by Rainer Johanni)
* - openDML large-AVI docs
*/
/**
* SECTION:element-avimux
*
* Muxes raw or compressed audio and/or video streams into an AVI file.
*
* <refsect2>
* <title>Example launch lines</title>
* <para>(write everything in one line, without the backslash characters)</para>
* |[
* gst-launch videotestsrc num-buffers=250 \
* ! 'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1' \
* ! queue ! mux. \
* audiotestsrc num-buffers=440 ! audioconvert \
* ! 'audio/x-raw,rate=44100,channels=2' ! queue ! mux. \
* avimux name=mux ! filesink location=test.avi
* ]| This will create an .AVI file containing an uncompressed video stream
* with a test picture and an uncompressed audio stream containing a
* test sound.
* |[
* gst-launch videotestsrc num-buffers=250 \
* ! 'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1' \
* ! xvidenc ! queue ! mux. \
* audiotestsrc num-buffers=440 ! audioconvert ! 'audio/x-raw,rate=44100,channels=2' \
* ! lame ! queue ! mux. \
* avimux name=mux ! filesink location=test.avi
* ]| This will create an .AVI file containing the same test video and sound
* as above, only that both streams will be compressed this time. This will
* only work if you have the necessary encoder elements installed of course.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gst/gst-i18n-plugin.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <gst/base/gstbytewriter.h>
#include "gstavimux.h"
GST_DEBUG_CATEGORY_STATIC (avimux_debug);
#define GST_CAT_DEFAULT avimux_debug
enum
{
ARG_0,
ARG_BIGFILE
};
#define DEFAULT_BIGFILE TRUE
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-msvideo")
);
static GstStaticPadTemplate video_sink_factory =
GST_STATIC_PAD_TEMPLATE ("video_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/x-raw, "
"format = (string) { YUY2, I420 }, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ]; "
"image/jpeg, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ]; "
"video/x-divx, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ], "
"divxversion = (int) [ 3, 5 ]; "
"video/x-xvid, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ]; "
"video/x-3ivx, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ]; "
"video/x-msmpeg, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ], "
"msmpegversion = (int) [ 41, 43 ]; "
"video/mpeg, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ], "
"mpegversion = (int) { 1, 2, 4}, "
"systemstream = (boolean) FALSE; "
"video/x-h263, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ]; "
"video/x-h264, "
"stream-format = (string) byte-stream, "
"alignment = (string) au, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (fraction) [ 0, MAX ]; "
"video/x-dv, "
"width = (int) 720, "
"height = (int) { 576, 480 }, "
"framerate = (fraction) [ 0, MAX ], "
"systemstream = (boolean) FALSE; "
"video/x-huffyuv, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ];"
"video/x-wmv, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0, MAX ], "
"wmvversion = (int) [ 1, 3];"
"image/x-jpc, "
"width = (int) [ 1, 2147483647 ], "
"height = (int) [ 1, 2147483647 ], "
"framerate = (fraction) [ 0, MAX ];"
"video/x-vp8, "
"width = (int) [ 1, 2147483647 ], "
"height = (int) [ 1, 2147483647 ], "
"framerate = (fraction) [ 0, MAX ]")
);
static GstStaticPadTemplate audio_sink_factory =
GST_STATIC_PAD_TEMPLATE ("audio_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("audio/x-raw, "
"format = (string) { U8, S16LE }, "
"rate = (int) [ 1000, 96000 ], "
"channels = (int) [ 1, 2 ]; "
"audio/mpeg, "
"mpegversion = (int) 1, "
"layer = (int) [ 1, 3 ], "
"rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ]; "
"audio/mpeg, "
"mpegversion = (int) 4, "
"stream-format = (string) raw, "
"rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ]; "
/*#if 0 VC6 doesn't support #if here ...
"audio/x-vorbis, "
"rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ]; "
#endif*/
"audio/x-ac3, "
"rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 6 ]; "
"audio/x-alaw, "
"rate = (int) [ 1000, 48000 ], " "channels = (int) [ 1, 2 ]; "
"audio/x-mulaw, "
"rate = (int) [ 1000, 48000 ], " "channels = (int) [ 1, 2 ]; "
"audio/x-wma, "
"rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ], "
"wmaversion = (int) [ 1, 2 ] ")
);
static void gst_avi_mux_pad_reset (GstAviPad * avipad, gboolean free);
static GstFlowReturn gst_avi_mux_collect_pads (GstCollectPads * pads,
GstAviMux * avimux);
static gboolean gst_avi_mux_handle_event (GstCollectPads * pad,
GstCollectData * data, GstEvent * event, gpointer user_data);
static GstPad *gst_avi_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void gst_avi_mux_release_pad (GstElement * element, GstPad * pad);
static void gst_avi_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_avi_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_avi_mux_change_state (GstElement * element,
GstStateChange transition);
#define gst_avi_mux_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstAviMux, gst_avi_mux, GST_TYPE_ELEMENT,
G_IMPLEMENT_INTERFACE (GST_TYPE_TAG_SETTER, NULL));
static void
gst_avi_mux_finalize (GObject * object)
{
GstAviMux *mux = GST_AVI_MUX (object);
GSList *node;
/* completely free each sinkpad */
node = mux->sinkpads;
while (node) {
GstAviPad *avipad = (GstAviPad *) node->data;
node = node->next;
gst_avi_mux_pad_reset (avipad, TRUE);
g_free (avipad);
}
g_slist_free (mux->sinkpads);
mux->sinkpads = NULL;
g_free (mux->idx);
mux->idx = NULL;
gst_object_unref (mux->collect);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_avi_mux_class_init (GstAviMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
GST_DEBUG_CATEGORY_INIT (avimux_debug, "avimux", 0, "Muxer for AVI streams");
gobject_class->get_property = gst_avi_mux_get_property;
gobject_class->set_property = gst_avi_mux_set_property;
gobject_class->finalize = gst_avi_mux_finalize;
g_object_class_install_property (gobject_class, ARG_BIGFILE,
g_param_spec_boolean ("bigfile", "Bigfile Support (>2GB)",
"Support for openDML-2.0 (big) AVI files", DEFAULT_BIGFILE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_avi_mux_request_new_pad);
gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_avi_mux_release_pad);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_avi_mux_change_state);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&audio_sink_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&video_sink_factory));
gst_element_class_set_static_metadata (gstelement_class, "Avi muxer",
"Codec/Muxer",
"Muxes audio and video into an avi stream",
"GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
}
/* reset pad to initial state
* free - if true, release all, not only stream related, data */
static void
gst_avi_mux_pad_reset (GstAviPad * avipad, gboolean free)
{
/* generic part */
memset (&(avipad->hdr), 0, sizeof (gst_riff_strh));
memset (&(avipad->idx[0]), 0, sizeof (avipad->idx));
if (free) {
g_free (avipad->tag);
avipad->tag = NULL;
g_free (avipad->idx_tag);
avipad->idx_tag = NULL;
}
if (avipad->is_video) {
GstAviVideoPad *vidpad = (GstAviVideoPad *) avipad;
avipad->hdr.type = GST_MAKE_FOURCC ('v', 'i', 'd', 's');
if (vidpad->vids_codec_data) {
gst_buffer_unref (vidpad->vids_codec_data);
vidpad->vids_codec_data = NULL;
}
if (vidpad->prepend_buffer) {
gst_buffer_unref (vidpad->prepend_buffer);
vidpad->prepend_buffer = NULL;
}
memset (&(vidpad->vids), 0, sizeof (gst_riff_strf_vids));
memset (&(vidpad->vprp), 0, sizeof (gst_riff_vprp));
} else {
GstAviAudioPad *audpad = (GstAviAudioPad *) avipad;
audpad->samples = 0;
avipad->hdr.type = GST_MAKE_FOURCC ('a', 'u', 'd', 's');
if (audpad->auds_codec_data) {
gst_buffer_unref (audpad->auds_codec_data);
audpad->auds_codec_data = NULL;
}
memset (&(audpad->auds), 0, sizeof (gst_riff_strf_auds));
}
}
static void
gst_avi_mux_reset (GstAviMux * avimux)
{
GSList *node, *newlist = NULL;
/* free and reset each sinkpad */
node = avimux->sinkpads;
while (node) {
GstAviPad *avipad = (GstAviPad *) node->data;
node = node->next;
gst_avi_mux_pad_reset (avipad, FALSE);
/* if this pad has collectdata, keep it, otherwise dump it completely */
if (avipad->collect)
newlist = g_slist_append (newlist, avipad);
else {
gst_avi_mux_pad_reset (avipad, TRUE);
g_free (avipad);
}
}
/* free the old list of sinkpads, only keep the real collecting ones */
g_slist_free (avimux->sinkpads);
avimux->sinkpads = newlist;
/* avi data */
avimux->num_frames = 0;
memset (&(avimux->avi_hdr), 0, sizeof (gst_riff_avih));
avimux->avi_hdr.max_bps = 10000000;
avimux->codec_data_size = 0;
if (avimux->tags_snap) {
gst_tag_list_free (avimux->tags_snap);
avimux->tags_snap = NULL;
}
g_free (avimux->idx);
avimux->idx = NULL;
/* state info */
avimux->write_header = TRUE;
/* tags */
gst_tag_setter_reset_tags (GST_TAG_SETTER (avimux));
}
static void
gst_avi_mux_init (GstAviMux * avimux)
{
avimux->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_use_fixed_caps (avimux->srcpad);
gst_element_add_pad (GST_ELEMENT (avimux), avimux->srcpad);
/* property */
avimux->enable_large_avi = DEFAULT_BIGFILE;
avimux->collect = gst_collect_pads_new ();
gst_collect_pads_set_function (avimux->collect,
(GstCollectPadsFunction) (GST_DEBUG_FUNCPTR (gst_avi_mux_collect_pads)),
avimux);
gst_collect_pads_set_event_function (avimux->collect,
(GstCollectPadsEventFunction) (GST_DEBUG_FUNCPTR
(gst_avi_mux_handle_event)), avimux);
/* set to clean state */
gst_avi_mux_reset (avimux);
}
static gboolean
gst_avi_mux_vidsink_set_caps (GstPad * pad, GstCaps * vscaps)
{
GstAviMux *avimux;
GstAviVideoPad *avipad;
GstAviCollectData *collect_pad;
GstStructure *structure;
const gchar *mimetype;
const GValue *fps, *par;
const GValue *codec_data;
gint width, height;
gint par_n, par_d;
gboolean codec_data_in_headers = TRUE;
avimux = GST_AVI_MUX (gst_pad_get_parent (pad));
/* find stream data */
collect_pad = (GstAviCollectData *) gst_pad_get_element_private (pad);
g_assert (collect_pad);
avipad = (GstAviVideoPad *) collect_pad->avipad;
g_assert (avipad);
g_assert (avipad->parent.is_video);
g_assert (avipad->parent.hdr.type == GST_MAKE_FOURCC ('v', 'i', 'd', 's'));
GST_DEBUG_OBJECT (avimux, "%s:%s, caps=%" GST_PTR_FORMAT,
GST_DEBUG_PAD_NAME (pad), vscaps);
structure = gst_caps_get_structure (vscaps, 0);
mimetype = gst_structure_get_name (structure);
/* global */
avipad->vids.size = sizeof (gst_riff_strf_vids);
avipad->vids.planes = 1;
if (!gst_structure_get_int (structure, "width", &width) ||
!gst_structure_get_int (structure, "height", &height)) {
goto refuse_caps;
}
avipad->vids.width = width;
avipad->vids.height = height;
fps = gst_structure_get_value (structure, "framerate");
if (fps == NULL || !GST_VALUE_HOLDS_FRACTION (fps))
goto refuse_caps;
avipad->parent.hdr.rate = gst_value_get_fraction_numerator (fps);
avipad->parent.hdr.scale = gst_value_get_fraction_denominator (fps);
/* (pixel) aspect ratio data, if any */
par = gst_structure_get_value (structure, "pixel-aspect-ratio");
/* only use video properties header if there is non-trivial aspect info */
if (par && GST_VALUE_HOLDS_FRACTION (par) &&
((par_n = gst_value_get_fraction_numerator (par)) !=
(par_d = gst_value_get_fraction_denominator (par)))) {
GValue to_ratio = { 0, };
guint ratio_n, ratio_d;
/* some fraction voodoo to obtain simplest possible ratio */
g_value_init (&to_ratio, GST_TYPE_FRACTION);
gst_value_set_fraction (&to_ratio, width * par_n, height * par_d);
ratio_n = gst_value_get_fraction_numerator (&to_ratio);
ratio_d = gst_value_get_fraction_denominator (&to_ratio);
GST_DEBUG_OBJECT (avimux, "generating vprp data with aspect ratio %d/%d",
ratio_n, ratio_d);
/* simply fill in */
avipad->vprp.vert_rate = avipad->parent.hdr.rate / avipad->parent.hdr.scale;
avipad->vprp.hor_t_total = width;
avipad->vprp.vert_lines = height;
avipad->vprp.aspect = (ratio_n) << 16 | (ratio_d & 0xffff);
avipad->vprp.width = width;
avipad->vprp.height = height;
avipad->vprp.fields = 1;
avipad->vprp.field_info[0].compressed_bm_height = height;
avipad->vprp.field_info[0].compressed_bm_width = width;
avipad->vprp.field_info[0].valid_bm_height = height;
avipad->vprp.field_info[0].valid_bm_width = width;
}
if (!strcmp (mimetype, "video/x-raw")) {
const gchar *format;
GstVideoFormat fmt;
format = gst_structure_get_string (structure, "format");
fmt = gst_video_format_from_string (format);
switch (fmt) {
case GST_VIDEO_FORMAT_YUY2:
avipad->vids.compression = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
avipad->vids.bit_cnt = 16;
break;
case GST_VIDEO_FORMAT_I420:
avipad->vids.compression = GST_MAKE_FOURCC ('I', '4', '2', '0');
avipad->vids.bit_cnt = 12;
break;
default:
break;
}
} else {
avipad->vids.bit_cnt = 24;
avipad->vids.compression = 0;
/* find format */
if (!strcmp (mimetype, "video/x-huffyuv")) {
avipad->vids.compression = GST_MAKE_FOURCC ('H', 'F', 'Y', 'U');
} else if (!strcmp (mimetype, "image/jpeg")) {
avipad->vids.compression = GST_MAKE_FOURCC ('M', 'J', 'P', 'G');
} else if (!strcmp (mimetype, "video/x-divx")) {
gint divxversion;
gst_structure_get_int (structure, "divxversion", &divxversion);
switch (divxversion) {
case 3:
avipad->vids.compression = GST_MAKE_FOURCC ('D', 'I', 'V', '3');
break;
case 4:
avipad->vids.compression = GST_MAKE_FOURCC ('D', 'I', 'V', 'X');
break;
case 5:
avipad->vids.compression = GST_MAKE_FOURCC ('D', 'X', '5', '0');
break;
}
} else if (!strcmp (mimetype, "video/x-xvid")) {
avipad->vids.compression = GST_MAKE_FOURCC ('X', 'V', 'I', 'D');
} else if (!strcmp (mimetype, "video/x-3ivx")) {
avipad->vids.compression = GST_MAKE_FOURCC ('3', 'I', 'V', '2');
} else if (gst_structure_has_name (structure, "video/x-msmpeg")) {
gint msmpegversion;
gst_structure_get_int (structure, "msmpegversion", &msmpegversion);
switch (msmpegversion) {
case 41:
avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'G', '4');
break;
case 42:
avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', '4', '2');
break;
case 43:
avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', '4', '3');
break;
default:
GST_INFO ("unhandled msmpegversion : %d, fall back to fourcc=MPEG",
msmpegversion);
avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'E', 'G');
break;
}
} else if (!strcmp (mimetype, "video/x-dv")) {
avipad->vids.compression = GST_MAKE_FOURCC ('D', 'V', 'S', 'D');
} else if (!strcmp (mimetype, "video/x-h263")) {
avipad->vids.compression = GST_MAKE_FOURCC ('H', '2', '6', '3');
} else if (!strcmp (mimetype, "video/x-h264")) {
avipad->vids.compression = GST_MAKE_FOURCC ('H', '2', '6', '4');
} else if (!strcmp (mimetype, "video/mpeg")) {
gint mpegversion;
gst_structure_get_int (structure, "mpegversion", &mpegversion);
switch (mpegversion) {
case 2:
avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'G', '2');
break;
case 4:
/* mplayer/ffmpeg might not work with DIVX, but with FMP4 */
avipad->vids.compression = GST_MAKE_FOURCC ('D', 'I', 'V', 'X');
/* DIVX/XVID in AVI store the codec_data chunk as part of the
first data buffer. So for this case, we prepend the codec_data
blob (if any) to that first buffer */
codec_data_in_headers = FALSE;
break;
default:
GST_INFO ("unhandled mpegversion : %d, fall back to fourcc=MPEG",
mpegversion);
avipad->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'E', 'G');
break;
}
} else if (!strcmp (mimetype, "video/x-wmv")) {
gint wmvversion;
if (gst_structure_get_int (structure, "wmvversion", &wmvversion)) {
switch (wmvversion) {
case 1:
avipad->vids.compression = GST_MAKE_FOURCC ('W', 'M', 'V', '1');
break;
case 2:
avipad->vids.compression = GST_MAKE_FOURCC ('W', 'M', 'V', '2');
break;
case 3:
avipad->vids.compression = GST_MAKE_FOURCC ('W', 'M', 'V', '3');
default:
break;
}
}
} else if (!strcmp (mimetype, "image/x-jpc")) {
avipad->vids.compression = GST_MAKE_FOURCC ('M', 'J', '2', 'C');
} else if (!strcmp (mimetype, "video/x-vp8")) {
avipad->vids.compression = GST_MAKE_FOURCC ('V', 'P', '8', '0');
}
if (!avipad->vids.compression)
goto refuse_caps;
}
/* codec initialization data, if any */
codec_data = gst_structure_get_value (structure, "codec_data");
if (codec_data) {
if (codec_data_in_headers) {
avipad->vids_codec_data = gst_value_get_buffer (codec_data);
gst_buffer_ref (avipad->vids_codec_data);
/* keep global track of size */
avimux->codec_data_size += gst_buffer_get_size (avipad->vids_codec_data);
} else {
avipad->prepend_buffer =
gst_buffer_ref (gst_value_get_buffer (codec_data));
}
}
avipad->parent.hdr.fcc_handler = avipad->vids.compression;
avipad->vids.image_size = avipad->vids.height * avipad->vids.width;
/* hm, maybe why avi only handles one stream well ... */
avimux->avi_hdr.width = avipad->vids.width;
avimux->avi_hdr.height = avipad->vids.height;
avimux->avi_hdr.us_frame = 1000000. * avipad->parent.hdr.scale /
avipad->parent.hdr.rate;
gst_object_unref (avimux);
return TRUE;
refuse_caps:
{
GST_WARNING_OBJECT (avimux, "refused caps %" GST_PTR_FORMAT, vscaps);
gst_object_unref (avimux);
return FALSE;
}
}
static GstFlowReturn
gst_avi_mux_audsink_scan_mpeg_audio (GstAviMux * avimux, GstAviPad * avipad,
GstBuffer * buffer)
{
GstMapInfo map;
guint spf;
guint32 header;
gulong layer;
gulong version;
gint lsf, mpg25;
gst_buffer_map (buffer, &map, GST_MAP_READ);
if (map.size < 4)
goto not_parsed;
header = GST_READ_UINT32_BE (map.data);
if ((header & 0xffe00000) != 0xffe00000)
goto not_parsed;
/* thanks go to mp3parse */
if (header & (1 << 20)) {
lsf = (header & (1 << 19)) ? 0 : 1;
mpg25 = 0;
} else {
lsf = 1;
mpg25 = 1;
}
version = 1 + lsf + mpg25;
layer = 4 - ((header >> 17) & 0x3);
/* see http://www.codeproject.com/audio/MPEGAudioInfo.asp */
if (layer == 1)
spf = 384;
else if (layer == 2)
spf = 1152;
else if (version == 1) {
spf = 1152;
} else {
/* MPEG-2 or "2.5" */
spf = 576;
}
if (G_UNLIKELY (avipad->hdr.scale <= 1))
avipad->hdr.scale = spf;
else if (G_UNLIKELY (avipad->hdr.scale != spf)) {
GST_WARNING_OBJECT (avimux, "input mpeg audio has varying frame size");
goto cbr_fallback;
}
done:
gst_buffer_unmap (buffer, &map);
return GST_FLOW_OK;
/* EXITS */
not_parsed:
{
GST_WARNING_OBJECT (avimux, "input mpeg audio is not parsed");
/* fall-through */
}
cbr_fallback:
{
GST_WARNING_OBJECT (avimux, "falling back to CBR muxing");
avipad->hdr.scale = 1;
/* no need to check further */
avipad->hook = NULL;
goto done;
}
}
static void
gst_avi_mux_audsink_set_fields (GstAviMux * avimux, GstAviAudioPad * avipad)
{
if (avipad->parent.hdr.scale > 1) {
/* vbr case: fixed duration per frame/chunk */
avipad->parent.hdr.rate = avipad->auds.rate;
avipad->parent.hdr.samplesize = 0;
/* FIXME ?? some rumours say this should be largest audio chunk size */
avipad->auds.blockalign = avipad->parent.hdr.scale;
} else {
/* by spec, hdr.rate is av_bps related, is calculated that way in stop_file,
* and reduces to sample rate in PCM like cases */
avipad->parent.hdr.rate = avipad->auds.av_bps / avipad->auds.blockalign;
avipad->parent.hdr.samplesize = avipad->auds.blockalign;
avipad->parent.hdr.scale = 1;
}
}
static gboolean
gst_avi_mux_audsink_set_caps (GstPad * pad, GstCaps * vscaps)
{
GstAviMux *avimux;
GstAviAudioPad *avipad;
GstAviCollectData *collect_pad;
GstStructure *structure;
const gchar *mimetype;
const GValue *codec_data;
gint channels, rate;
avimux = GST_AVI_MUX (gst_pad_get_parent (pad));
/* find stream data */
collect_pad = (GstAviCollectData *) gst_pad_get_element_private (pad);
g_assert (collect_pad);
avipad = (GstAviAudioPad *) collect_pad->avipad;
g_assert (avipad);
g_assert (!avipad->parent.is_video);
g_assert (avipad->parent.hdr.type == GST_MAKE_FOURCC ('a', 'u', 'd', 's'));
GST_DEBUG_OBJECT (avimux, "%s:%s, caps=%" GST_PTR_FORMAT,
GST_DEBUG_PAD_NAME (pad), vscaps);
structure = gst_caps_get_structure (vscaps, 0);
mimetype = gst_structure_get_name (structure);
/* we want these for all */
if (!gst_structure_get_int (structure, "channels", &channels) ||
!gst_structure_get_int (structure, "rate", &rate)) {
goto refuse_caps;
}
avipad->auds.channels = channels;
avipad->auds.rate = rate;
/* codec initialization data, if any */
codec_data = gst_structure_get_value (structure, "codec_data");
if (codec_data) {
avipad->auds_codec_data = gst_value_get_buffer (codec_data);
gst_buffer_ref (avipad->auds_codec_data);
/* keep global track of size */
avimux->codec_data_size += gst_buffer_get_size (avipad->auds_codec_data);
}
if (!strcmp (mimetype, "audio/x-raw")) {
const gchar *format;
GstAudioFormat fmt;
format = gst_structure_get_string (structure, "format");
fmt = gst_audio_format_from_string (format);
switch (fmt) {
case GST_AUDIO_FORMAT_U8:
avipad->auds.blockalign = 8;
avipad->auds.size = 8;
break;
case GST_AUDIO_FORMAT_S16:
avipad->auds.blockalign = 16;
avipad->auds.size = 16;
break;
default:
goto refuse_caps;
}
avipad->auds.format = GST_RIFF_WAVE_FORMAT_PCM;
/* set some more info straight */
avipad->auds.blockalign /= 8;
avipad->auds.blockalign *= avipad->auds.channels;
avipad->auds.av_bps = avipad->auds.blockalign * avipad->auds.rate;
} else {
avipad->auds.format = 0;
/* set some defaults */
avipad->auds.blockalign = 1;
avipad->auds.av_bps = 0;
avipad->auds.size = 16;
if (!strcmp (mimetype, "audio/mpeg")) {
gint mpegversion;
gst_structure_get_int (structure, "mpegversion", &mpegversion);
switch (mpegversion) {
case 1:{
gint layer = 3;
gboolean parsed = FALSE;
gst_structure_get_int (structure, "layer", &layer);
gst_structure_get_boolean (structure, "parsed", &parsed);
switch (layer) {
case 3:
avipad->auds.format = GST_RIFF_WAVE_FORMAT_MPEGL3;
break;
case 1:
case 2:
avipad->auds.format = GST_RIFF_WAVE_FORMAT_MPEGL12;
break;
}
if (parsed) {
/* treat as VBR, should also cover CBR case;
* setup hook to parse frame header and determine spf */
avipad->parent.hook = gst_avi_mux_audsink_scan_mpeg_audio;
} else {
GST_WARNING_OBJECT (avimux, "unparsed MPEG audio input (?), "
"doing CBR muxing");
}
break;
}
case 4:
{
GstBuffer *codec_data_buf = avipad->auds_codec_data;
const gchar *stream_format;
guint codec;
guint8 data[2];
stream_format = gst_structure_get_string (structure, "stream-format");
if (stream_format) {
if (strcmp (stream_format, "raw") != 0) {
GST_WARNING_OBJECT (avimux, "AAC's stream format '%s' is not "
"supported, please use 'raw'", stream_format);
break;
}
} else {
GST_WARNING_OBJECT (avimux, "AAC's stream-format not specified, "
"assuming 'raw'");
}
/* vbr case needs some special handling */
if (!codec_data_buf || gst_buffer_get_size (codec_data_buf) < 2) {
GST_WARNING_OBJECT (avimux, "no (valid) codec_data for AAC audio");
break;
}
avipad->auds.format = GST_RIFF_WAVE_FORMAT_AAC;
/* need to determine frame length */
gst_buffer_extract (codec_data_buf, 0, data, 2);
codec = GST_READ_UINT16_BE (data);
avipad->parent.hdr.scale = (codec & 0x4) ? 960 : 1024;
break;
}
}
} else if (!strcmp (mimetype, "audio/x-vorbis")) {
avipad->auds.format = GST_RIFF_WAVE_FORMAT_VORBIS3;
} else if (!strcmp (mimetype, "audio/x-ac3")) {
avipad->auds.format = GST_RIFF_WAVE_FORMAT_A52;
} else if (!strcmp (mimetype, "audio/x-alaw")) {
avipad->auds.format = GST_RIFF_WAVE_FORMAT_ALAW;
avipad->auds.size = 8;
avipad->auds.blockalign = avipad->auds.channels;
avipad->auds.av_bps = avipad->auds.blockalign * avipad->auds.rate;
} else if (!strcmp (mimetype, "audio/x-mulaw")) {
avipad->auds.format = GST_RIFF_WAVE_FORMAT_MULAW;
avipad->auds.size = 8;
avipad->auds.blockalign = avipad->auds.channels;
avipad->auds.av_bps = avipad->auds.blockalign * avipad->auds.rate;
} else if (!strcmp (mimetype, "audio/x-wma")) {
gint version;
gint bitrate;
gint block_align;
if (gst_structure_get_int (structure, "wmaversion", &version)) {
switch (version) {
case 1:
avipad->auds.format = GST_RIFF_WAVE_FORMAT_WMAV1;
break;
case 2:
avipad->auds.format = GST_RIFF_WAVE_FORMAT_WMAV2;
break;
default:
break;
}
}
if (avipad->auds.format != 0) {
if (gst_structure_get_int (structure, "block_align", &block_align)) {
avipad->auds.blockalign = block_align;
}
if (gst_structure_get_int (structure, "bitrate", &bitrate)) {
avipad->auds.av_bps = bitrate / 8;
}
}
}
}
if (!avipad->auds.format)
goto refuse_caps;
avipad->parent.hdr.fcc_handler = avipad->auds.format;
gst_avi_mux_audsink_set_fields (avimux, avipad);
gst_object_unref (avimux);
return TRUE;
refuse_caps:
{
GST_WARNING_OBJECT (avimux, "refused caps %" GST_PTR_FORMAT, vscaps);
gst_object_unref (avimux);
return FALSE;
}
}
static GstPad *
gst_avi_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps)
{
GstAviMux *avimux;
GstPad *newpad;
GstAviPad *avipad;
GstElementClass *klass;
gchar *name = NULL;
const gchar *pad_name = NULL;
gint pad_id;
g_return_val_if_fail (templ != NULL, NULL);
if (templ->direction != GST_PAD_SINK)
goto wrong_direction;
g_return_val_if_fail (GST_IS_AVI_MUX (element), NULL);
avimux = GST_AVI_MUX (element);
if (!avimux->write_header)
goto too_late;
klass = GST_ELEMENT_GET_CLASS (element);
if (templ == gst_element_class_get_pad_template (klass, "audio_%u")) {
/* don't mix named and unnamed pads, if the pad already exists we fail when
* trying to add it */
if (req_name != NULL && sscanf (req_name, "audio_%u", &pad_id) == 1) {
pad_name = req_name;
} else {
name = g_strdup_printf ("audio_%u", avimux->audio_pads++);
pad_name = name;
}
/* init pad specific data */
avipad = g_malloc0 (sizeof (GstAviAudioPad));
avipad->is_video = FALSE;
avipad->hdr.type = GST_MAKE_FOURCC ('a', 'u', 'd', 's');
/* audio goes last */
avimux->sinkpads = g_slist_append (avimux->sinkpads, avipad);
} else if (templ == gst_element_class_get_pad_template (klass, "video_%u")) {
/* though streams are pretty generic and relatively self-contained,
* some video info goes in a single avi header -and therefore mux struct-
* so video restricted to one stream */
if (avimux->video_pads > 0)
goto too_many_video_pads;
/* setup pad */
pad_name = "video_0";
avimux->video_pads++;
/* init pad specific data */
avipad = g_malloc0 (sizeof (GstAviVideoPad));
avipad->is_video = TRUE;
avipad->hdr.type = GST_MAKE_FOURCC ('v', 'i', 'd', 's');
/* video goes first */
avimux->sinkpads = g_slist_prepend (avimux->sinkpads, avipad);
} else
goto wrong_template;
newpad = gst_pad_new_from_template (templ, pad_name);
g_free (name);
avipad->collect = gst_collect_pads_add_pad (avimux->collect,
newpad, sizeof (GstAviCollectData));
((GstAviCollectData *) (avipad->collect))->avipad = avipad;
if (!gst_element_add_pad (element, newpad))
goto pad_add_failed;
GST_DEBUG_OBJECT (newpad, "Added new request pad");
return newpad;
/* ERRORS */
wrong_direction:
{
g_warning ("avimux: request pad that is not a SINK pad\n");
return NULL;
}
too_late:
{
g_warning ("avimux: request pad cannot be added after streaming started\n");
return NULL;
}
wrong_template:
{
g_warning ("avimux: this is not our template!\n");
return NULL;
}
too_many_video_pads:
{
GST_WARNING_OBJECT (avimux, "Can only have one video stream");
return NULL;
}
pad_add_failed:
{
GST_WARNING_OBJECT (avimux, "Adding the new pad '%s' failed", pad_name);
gst_object_unref (newpad);
return NULL;
}
}
static void
gst_avi_mux_release_pad (GstElement * element, GstPad * pad)
{
GstAviMux *avimux = GST_AVI_MUX (element);
GSList *node;
node = avimux->sinkpads;
while (node) {
GstAviPad *avipad = (GstAviPad *) node->data;
if (avipad->collect->pad == pad) {
/* pad count should not be adjusted,
* as it also represent number of streams present */
avipad->collect = NULL;
GST_DEBUG_OBJECT (avimux, "removed pad '%s'", GST_PAD_NAME (pad));
gst_collect_pads_remove_pad (avimux->collect, pad);
gst_element_remove_pad (element, pad);
/* if not started yet, we can remove any sign this pad ever existed */
/* in this case _start will take care of the real pad count */
if (avimux->write_header) {
avimux->sinkpads = g_slist_remove (avimux->sinkpads, avipad);
gst_avi_mux_pad_reset (avipad, TRUE);
g_free (avipad);
}
return;
}
node = node->next;
}
g_warning ("Unknown pad %s", GST_PAD_NAME (pad));
}
static inline guint
gst_avi_mux_start_chunk (GstByteWriter * bw, const gchar * tag, guint32 fourcc)
{
guint chunk_offset;
gboolean hdl = TRUE;
if (tag)
hdl &= gst_byte_writer_put_data (bw, (const guint8 *) tag, 4);
else
hdl &= gst_byte_writer_put_uint32_le (bw, fourcc);
chunk_offset = gst_byte_writer_get_pos (bw);
/* real chunk size comes later */
hdl &= gst_byte_writer_put_uint32_le (bw, 0);
return chunk_offset;
}
static inline void
gst_avi_mux_end_chunk (GstByteWriter * bw, guint chunk_offset)
{
guint size;
gboolean hdl = TRUE;
size = gst_byte_writer_get_pos (bw);
gst_byte_writer_set_pos (bw, chunk_offset);
hdl &= gst_byte_writer_put_uint32_le (bw, size - chunk_offset - 4);
gst_byte_writer_set_pos (bw, size);
/* arrange for even padding */
if (size & 1)
hdl &= gst_byte_writer_put_uint8 (bw, 0);
}
/* maybe some of these functions should be moved to riff.h? */
static void
gst_avi_mux_write_tag (const GstTagList * list, const gchar * tag,
gpointer data)
{
const struct
{
guint32 fcc;
const gchar *tag;
} rifftags[] = {
{
GST_RIFF_INFO_IARL, GST_TAG_LOCATION}, {
GST_RIFF_INFO_IART, GST_TAG_ARTIST}, {
GST_RIFF_INFO_ICMT, GST_TAG_COMMENT}, {
GST_RIFF_INFO_ICOP, GST_TAG_COPYRIGHT}, {
GST_RIFF_INFO_ICRD, GST_TAG_DATE}, {
GST_RIFF_INFO_IGNR, GST_TAG_GENRE}, {
GST_RIFF_INFO_IKEY, GST_TAG_KEYWORDS}, {
GST_RIFF_INFO_INAM, GST_TAG_TITLE}, {
GST_RIFF_INFO_ISFT, GST_TAG_ENCODER}, {
GST_RIFF_INFO_ISRC, GST_TAG_ISRC}, {
0, NULL}
};
gint n;
gchar *str;
GstByteWriter *bw = data;
guint chunk;
for (n = 0; rifftags[n].fcc != 0; n++) {
if (!strcmp (rifftags[n].tag, tag) &&
gst_tag_list_get_string (list, tag, &str) && str) {
chunk = gst_avi_mux_start_chunk (bw, NULL, rifftags[n].fcc);
gst_byte_writer_put_string (bw, str);
gst_avi_mux_end_chunk (bw, chunk);
g_free (str);
break;
}
}
}
static GstBuffer *
gst_avi_mux_riff_get_avi_header (GstAviMux * avimux)
{
const GstTagList *tags;
GstBuffer *buffer = NULL;
gint size = 0;
GstByteWriter bw;
GSList *node;
guint avih, riff, hdrl;
GstMapInfo map;
gboolean hdl = TRUE;
GST_DEBUG_OBJECT (avimux, "creating avi header, data_size %u, idx_size %u",
avimux->data_size, avimux->idx_size);
if (avimux->tags_snap)
tags = avimux->tags_snap;
else {
/* need to make snapshot of current state of tags to ensure the same set
* is used next time around during header rewrite at the end */
tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (avimux));
if (tags)
tags = avimux->tags_snap = gst_tag_list_copy (tags);
}
gst_byte_writer_init_with_size (&bw, 1024, FALSE);
/* avi header metadata */
riff = gst_avi_mux_start_chunk (&bw, "RIFF", 0);
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "AVI ", 4);
hdrl = gst_avi_mux_start_chunk (&bw, "LIST", 0);
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "hdrl", 4);
avih = gst_avi_mux_start_chunk (&bw, "avih", 0);
/* the AVI header itself */
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.us_frame);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.max_bps);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.pad_gran);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.flags);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.tot_frames);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.init_frames);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.streams);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.bufsize);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.width);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.height);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.scale);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.rate);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.start);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->avi_hdr.length);
gst_avi_mux_end_chunk (&bw, avih);
/* stream data */
node = avimux->sinkpads;
while (node) {
GstAviPad *avipad = (GstAviPad *) node->data;
GstAviVideoPad *vidpad = (GstAviVideoPad *) avipad;
GstAviAudioPad *audpad = (GstAviAudioPad *) avipad;
gint codec_size = 0;
guint strh, strl, strf, indx;
/* stream list metadata */
strl = gst_avi_mux_start_chunk (&bw, "LIST", 0);
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "strl", 4);
/* generic header */
strh = gst_avi_mux_start_chunk (&bw, "strh", 0);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.type);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.fcc_handler);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.flags);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.priority);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.init_frames);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.scale);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.rate);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.start);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.length);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.bufsize);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.quality);
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->hdr.samplesize);
hdl &= gst_byte_writer_put_uint16_le (&bw, 0);
hdl &= gst_byte_writer_put_uint16_le (&bw, 0);
hdl &= gst_byte_writer_put_uint16_le (&bw, 0);
hdl &= gst_byte_writer_put_uint16_le (&bw, 0);
gst_avi_mux_end_chunk (&bw, strh);
if (avipad->is_video) {
codec_size = vidpad->vids_codec_data ?
gst_buffer_get_size (vidpad->vids_codec_data) : 0;
/* the video header */
strf = gst_avi_mux_start_chunk (&bw, "strf", 0);
/* the actual header */
hdl &=
gst_byte_writer_put_uint32_le (&bw, vidpad->vids.size + codec_size);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.width);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.height);
hdl &= gst_byte_writer_put_uint16_le (&bw, vidpad->vids.planes);
hdl &= gst_byte_writer_put_uint16_le (&bw, vidpad->vids.bit_cnt);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.compression);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.image_size);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.xpels_meter);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.ypels_meter);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.num_colors);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vids.imp_colors);
if (vidpad->vids_codec_data) {
gst_buffer_map (vidpad->vids_codec_data, &map, GST_MAP_READ);
hdl &= gst_byte_writer_put_data (&bw, map.data, map.size);
gst_buffer_unmap (vidpad->vids_codec_data, &map);
}
gst_avi_mux_end_chunk (&bw, strf);
/* add video property data, mainly for aspect ratio, if any */
if (vidpad->vprp.aspect) {
gint f;
guint vprp;
/* let's be on the safe side */
vidpad->vprp.fields = MIN (vidpad->vprp.fields,
GST_RIFF_VPRP_VIDEO_FIELDS);
/* the vprp header */
vprp = gst_avi_mux_start_chunk (&bw, "vprp", 0);
/* the actual data */
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.format_token);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.standard);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.vert_rate);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.hor_t_total);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.vert_lines);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.aspect);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.width);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.height);
hdl &= gst_byte_writer_put_uint32_le (&bw, vidpad->vprp.fields);
for (f = 0; f < vidpad->vprp.fields; ++f) {
gst_riff_vprp_video_field_desc *fd;
fd = &(vidpad->vprp.field_info[f]);
hdl &= gst_byte_writer_put_uint32_le (&bw, fd->compressed_bm_height);
hdl &= gst_byte_writer_put_uint32_le (&bw, fd->compressed_bm_width);
hdl &= gst_byte_writer_put_uint32_le (&bw, fd->valid_bm_height);
hdl &= gst_byte_writer_put_uint32_le (&bw, fd->valid_bm_width);
hdl &= gst_byte_writer_put_uint32_le (&bw, fd->valid_bm_x_offset);
hdl &= gst_byte_writer_put_uint32_le (&bw, fd->valid_bm_y_offset);
hdl &= gst_byte_writer_put_uint32_le (&bw, fd->video_x_t_offset);
hdl &= gst_byte_writer_put_uint32_le (&bw, fd->video_y_start);
}
gst_avi_mux_end_chunk (&bw, vprp);
}
} else {
codec_size = audpad->auds_codec_data ?
gst_buffer_get_size (audpad->auds_codec_data) : 0;
/* the audio header */
strf = gst_avi_mux_start_chunk (&bw, "strf", 0);
/* the actual header */
hdl &= gst_byte_writer_put_uint16_le (&bw, audpad->auds.format);
hdl &= gst_byte_writer_put_uint16_le (&bw, audpad->auds.channels);
hdl &= gst_byte_writer_put_uint32_le (&bw, audpad->auds.rate);
hdl &= gst_byte_writer_put_uint32_le (&bw, audpad->auds.av_bps);
hdl &= gst_byte_writer_put_uint16_le (&bw, audpad->auds.blockalign);
hdl &= gst_byte_writer_put_uint16_le (&bw, audpad->auds.size);
hdl &= gst_byte_writer_put_uint16_le (&bw, codec_size);
if (audpad->auds_codec_data) {
gst_buffer_map (audpad->auds_codec_data, &map, GST_MAP_READ);
hdl &= gst_byte_writer_put_data (&bw, map.data, map.size);
gst_buffer_unmap (vidpad->vids_codec_data, &map);
}
gst_avi_mux_end_chunk (&bw, strf);
}
/* odml superindex chunk */
if (avipad->idx_index > 0)
indx = gst_avi_mux_start_chunk (&bw, "indx", 0);
else
indx = gst_avi_mux_start_chunk (&bw, "JUNK", 0);
hdl &= gst_byte_writer_put_uint16_le (&bw, 4); /* bytes per entry */
hdl &= gst_byte_writer_put_uint8 (&bw, 0); /* index subtype */
hdl &= gst_byte_writer_put_uint8 (&bw, GST_AVI_INDEX_OF_INDEXES); /* index type */
hdl &= gst_byte_writer_put_uint32_le (&bw, avipad->idx_index); /* entries in use */
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) avipad->tag, 4); /* stream id */
hdl &= gst_byte_writer_put_uint32_le (&bw, 0); /* reserved */
hdl &= gst_byte_writer_put_uint32_le (&bw, 0); /* reserved */
hdl &= gst_byte_writer_put_uint32_le (&bw, 0); /* reserved */
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) avipad->idx,
GST_AVI_SUPERINDEX_COUNT * sizeof (gst_avi_superindex_entry));
gst_avi_mux_end_chunk (&bw, indx);
/* end strl for this stream */
gst_avi_mux_end_chunk (&bw, strl);
node = node->next;
}
if (avimux->video_pads > 0) {
guint odml, dmlh;
/* odml header */
odml = gst_avi_mux_start_chunk (&bw, "LIST", 0);
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "odml", 4);
dmlh = gst_avi_mux_start_chunk (&bw, "dmlh", 0);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->total_frames);
gst_avi_mux_end_chunk (&bw, dmlh);
gst_avi_mux_end_chunk (&bw, odml);
}
/* end hdrl */
gst_avi_mux_end_chunk (&bw, hdrl);
/* tags */
if (tags) {
guint info;
info = gst_avi_mux_start_chunk (&bw, "LIST", 0);
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "INFO", 4);
gst_tag_list_foreach (tags, gst_avi_mux_write_tag, &bw);
if (info + 8 == gst_byte_writer_get_pos (&bw)) {
/* no tags writen, remove the empty INFO LIST as it is useless
* and prevents playback in vlc */
gst_byte_writer_set_pos (&bw, info - 4);
} else {
gst_avi_mux_end_chunk (&bw, info);
}
}
/* pop RIFF */
gst_avi_mux_end_chunk (&bw, riff);
/* avi data header */
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "LIST", 4);
hdl &= gst_byte_writer_put_uint32_le (&bw, avimux->data_size);
hdl &= gst_byte_writer_put_data (&bw, (guint8 *) "movi", 4);
if (!hdl)
goto beach;
/* now get the data */
buffer = gst_byte_writer_reset_and_get_buffer (&bw);
/* ... but RIFF includes more than just header */
gst_buffer_map (buffer, &map, GST_MAP_READWRITE);
size = GST_READ_UINT32_LE (map.data + 4);
size += 8 + avimux->data_size + avimux->idx_size;
GST_WRITE_UINT32_LE (map.data + 4, size);
GST_MEMDUMP_OBJECT (avimux, "avi header", map.data, map.size);
gst_buffer_unmap (buffer, &map);
beach:
return buffer;
}
static GstBuffer *
gst_avi_mux_riff_get_avix_header (guint32 datax_size)
{
GstBuffer *buffer;
GstMapInfo map;
buffer = gst_buffer_new_and_alloc (24);
gst_buffer_map (buffer, &map, GST_MAP_WRITE);
memcpy (map.data + 0, "RIFF", 4);
GST_WRITE_UINT32_LE (map.data + 4, datax_size + 3 * 4);
memcpy (map.data + 8, "AVIX", 4);
memcpy (map.data + 12, "LIST", 4);
GST_WRITE_UINT32_LE (map.data + 16, datax_size);
memcpy (map.data + 20, "movi", 4);
gst_buffer_unmap (buffer, &map);
return buffer;
}
static inline GstBuffer *
gst_avi_mux_riff_get_header (GstAviPad * avipad, guint32 video_frame_size)
{
GstBuffer *buffer;
GstMapInfo map;
buffer = gst_buffer_new_and_alloc (8);
gst_buffer_map (buffer, &map, GST_MAP_WRITE);
memcpy (map.data + 0, avipad->tag, 4);
GST_WRITE_UINT32_LE (map.data + 4, video_frame_size);
gst_buffer_unmap (buffer, &map);
return buffer;
}
/* write an odml index chunk in the movi list */
static GstFlowReturn
gst_avi_mux_write_avix_index (GstAviMux * avimux, GstAviPad * avipad,
gchar * code, gchar * chunk, gst_avi_superindex_entry * super_index,
gint * super_index_count)
{
GstFlowReturn res;
GstBuffer *buffer;
guint8 *data;
gst_riff_index_entry *entry;
gint i;
guint32 size, entry_count;
gboolean is_pcm = FALSE;
guint32 pcm_samples = 0;
GstMapInfo map;
/* check if it is pcm */
if (avipad && !avipad->is_video) {
GstAviAudioPad *audiopad = (GstAviAudioPad *) avipad;
if (audiopad->auds.format == GST_RIFF_WAVE_FORMAT_PCM) {
pcm_samples = audiopad->samples;
is_pcm = TRUE;
}
}
/* allocate the maximum possible */
buffer = gst_buffer_new_and_alloc (32 + 8 * avimux->idx_index);
gst_buffer_map (buffer, &map, GST_MAP_WRITE);
data = map.data;
/* general index chunk info */
memcpy (map.data + 0, chunk, 4); /* chunk id */
GST_WRITE_UINT32_LE (map.data + 4, 0); /* chunk size; fill later */
GST_WRITE_UINT16_LE (map.data + 8, 2); /* index entry is 2 words */
map.data[10] = 0; /* index subtype */
map.data[11] = GST_AVI_INDEX_OF_CHUNKS; /* index type: AVI_INDEX_OF_CHUNKS */
GST_WRITE_UINT32_LE (map.data + 12, 0); /* entries in use; fill later */
memcpy (map.data + 16, code, 4); /* stream to which index refers */
GST_WRITE_UINT64_LE (map.data + 20, avimux->avix_start); /* base offset */
GST_WRITE_UINT32_LE (map.data + 28, 0); /* reserved */
map.data += 32;
/* now the actual index entries */
i = avimux->idx_index;
entry = avimux->idx;
while (i > 0) {
if (memcmp (&entry->id, code, 4) == 0) {
/* enter relative offset to the data (!) */
GST_WRITE_UINT32_LE (map.data, GUINT32_FROM_LE (entry->offset) + 8);
/* msb is set if not (!) keyframe */
GST_WRITE_UINT32_LE (map.data + 4, GUINT32_FROM_LE (entry->size)
| (GUINT32_FROM_LE (entry->flags)
& GST_RIFF_IF_KEYFRAME ? 0 : 1U << 31));
map.data += 8;
}
i--;
entry++;
}
/* ok, now we know the size and no of entries, fill in where needed */
size = map.data - data;
GST_WRITE_UINT32_LE (data + 4, size - 8);
entry_count = (size - 32) / 8;
GST_WRITE_UINT32_LE (data + 12, entry_count);
gst_buffer_unmap (buffer, &map);
gst_buffer_resize (buffer, 0, size);
/* send */
if ((res = gst_pad_push (avimux->srcpad, buffer)) != GST_FLOW_OK)
return res;
/* keep track of this in superindex (if room) ... */
if (*super_index_count < GST_AVI_SUPERINDEX_COUNT) {
i = *super_index_count;
super_index[i].offset = GUINT64_TO_LE (avimux->total_data);
super_index[i].size = GUINT32_TO_LE (size);
if (is_pcm) {
super_index[i].duration = GUINT32_TO_LE (pcm_samples);
} else {
super_index[i].duration = GUINT32_TO_LE (entry_count);
}
(*super_index_count)++;
} else
GST_WARNING_OBJECT (avimux, "No more room in superindex of stream %s",
code);
/* ... and in size */
avimux->total_data += size;
if (avimux->is_bigfile)
avimux->datax_size += size;
else
avimux->data_size += size;
return GST_FLOW_OK;
}
/* some other usable functions (thankyou xawtv ;-) ) */
static void
gst_avi_mux_add_index (GstAviMux * avimux, GstAviPad * avipad, guint32 flags,
guint32 size)
{
gchar *code = avipad->tag;
if (avimux->idx_index == avimux->idx_count) {
avimux->idx_count += 256;
avimux->idx =
g_realloc (avimux->idx,
avimux->idx_count * sizeof (gst_riff_index_entry));
}
/* in case of pcm audio, we need to count the number of samples for
* putting in the indx entries */
if (!avipad->is_video) {
GstAviAudioPad *audiopad = (GstAviAudioPad *) avipad;
if (audiopad->auds.format == GST_RIFF_WAVE_FORMAT_PCM) {
audiopad->samples += size / audiopad->auds.blockalign;
}
}
memcpy (&(avimux->idx[avimux->idx_index].id), code, 4);
avimux->idx[avimux->idx_index].flags = GUINT32_TO_LE (flags);
avimux->idx[avimux->idx_index].offset = GUINT32_TO_LE (avimux->idx_offset);
avimux->idx[avimux->idx_index].size = GUINT32_TO_LE (size);
avimux->idx_index++;
}
static GstFlowReturn
gst_avi_mux_write_index (GstAviMux * avimux)
{
GstFlowReturn res;
GstBuffer *buffer;
GstMapInfo map;
guint8 *data;
gsize size;
buffer = gst_buffer_new_and_alloc (8);
gst_buffer_map (buffer, &map, GST_MAP_WRITE);
memcpy (map.data + 0, "idx1", 4);
GST_WRITE_UINT32_LE (map.data + 4,
avimux->idx_index * sizeof (gst_riff_index_entry));
gst_buffer_unmap (buffer, &map);
res = gst_pad_push (avimux->srcpad, buffer);
if (res != GST_FLOW_OK)
return res;
buffer = gst_buffer_new ();
size = avimux->idx_index * sizeof (gst_riff_index_entry);
data = (guint8 *) avimux->idx;
avimux->idx = NULL; /* will be free()'ed by gst_buffer_unref() */
gst_buffer_append_memory (buffer,
gst_memory_new_wrapped (0, data, size, 0, size, data, g_free));
avimux->total_data += size + 8;
res = gst_pad_push (avimux->srcpad, buffer);
if (res != GST_FLOW_OK)
return res;
avimux->idx_size += avimux->idx_index * sizeof (gst_riff_index_entry) + 8;
/* update header */
avimux->avi_hdr.flags |= GST_RIFF_AVIH_HASINDEX;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_avi_mux_bigfile (GstAviMux * avimux, gboolean last)
{
GstFlowReturn res = GST_FLOW_OK;
GstBuffer *header;
GSList *node;
/* first some odml standard index chunks in the movi list */
node = avimux->sinkpads;
while (node) {
GstAviPad *avipad = (GstAviPad *) node->data;
node = node->next;
res = gst_avi_mux_write_avix_index (avimux, avipad, avipad->tag,
avipad->idx_tag, avipad->idx, &avipad->idx_index);
if (res != GST_FLOW_OK)
return res;
}
if (avimux->is_bigfile) {
GstSegment segment;
gst_segment_init (&segment, GST_FORMAT_BYTES);
/* search back */
segment.start = avimux->avix_start;
segment.time = avimux->avix_start;
gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment));
/* rewrite AVIX header */
header = gst_avi_mux_riff_get_avix_header (avimux->datax_size);
res = gst_pad_push (avimux->srcpad, header);
/* go back to current location, at least try */
segment.start = avimux->total_data;
segment.time = avimux->total_data;
gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment));
if (res != GST_FLOW_OK)
return res;
} else { /* write a standard index in the first riff chunk */
res = gst_avi_mux_write_index (avimux);
/* the index data/buffer is freed by pushing it */
avimux->idx_count = 0;
if (res != GST_FLOW_OK)
return res;
}
avimux->avix_start = avimux->total_data;
if (last)
return res;
avimux->is_bigfile = TRUE;
avimux->numx_frames = 0;
avimux->datax_size = 4; /* movi tag */
avimux->idx_index = 0;
node = avimux->sinkpads;
while (node) {
GstAviPad *avipad = (GstAviPad *) node->data;
node = node->next;
if (!avipad->is_video) {
GstAviAudioPad *audiopad = (GstAviAudioPad *) avipad;
audiopad->samples = 0;
}
}
header = gst_avi_mux_riff_get_avix_header (0);
avimux->total_data += gst_buffer_get_size (header);
/* avix_start is used as base offset for the odml index chunk */
avimux->idx_offset = avimux->total_data - avimux->avix_start;
return gst_pad_push (avimux->srcpad, header);
}
/* enough header blabla now, let's go on to actually writing the headers */
static GstFlowReturn
gst_avi_mux_start_file (GstAviMux * avimux)
{
GstFlowReturn res;
GstBuffer *header;
GSList *node;
GstCaps *caps;
GstSegment segment;
avimux->total_data = 0;
avimux->total_frames = 0;
avimux->data_size = 4; /* movi tag */
avimux->datax_size = 0;
avimux->num_frames = 0;
avimux->numx_frames = 0;
avimux->avix_start = 0;
avimux->idx_index = 0;
avimux->idx_offset = 0; /* see 10 lines below */
avimux->idx_size = 0;
avimux->idx_count = 0;
avimux->idx = NULL;
/* state */
avimux->write_header = FALSE;
avimux->restart = FALSE;
/* init streams, see what we've got */
node = avimux->sinkpads;
avimux->audio_pads = avimux->video_pads = 0;
while (node) {
GstAviPad *avipad = (GstAviPad *) node->data;
node = node->next;
if (!avipad->is_video) {
/* audio stream numbers must start at 1 iff there is a video stream 0;
* request_pad inserts video pad at head of list, so this test suffices */
if (avimux->video_pads)
avimux->audio_pads++;
avipad->tag = g_strdup_printf ("%02uwb", avimux->audio_pads);
avipad->idx_tag = g_strdup_printf ("ix%02u", avimux->audio_pads);
if (!avimux->video_pads)
avimux->audio_pads++;
} else {
avipad->tag = g_strdup_printf ("%02udb", avimux->video_pads);
avipad->idx_tag = g_strdup_printf ("ix%02u", avimux->video_pads++);
}
}
caps = gst_pad_get_pad_template_caps (avimux->srcpad);
gst_pad_set_caps (avimux->srcpad, caps);
gst_caps_unref (caps);
/* let downstream know we think in BYTES and expect to do seeking later on */
gst_segment_init (&segment, GST_FORMAT_BYTES);
gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment));
/* header */
avimux->avi_hdr.streams = g_slist_length (avimux->sinkpads);
avimux->is_bigfile = FALSE;
header = gst_avi_mux_riff_get_avi_header (avimux);
avimux->total_data += gst_buffer_get_size (header);
res = gst_pad_push (avimux->srcpad, header);
avimux->idx_offset = avimux->total_data;
return res;
}
static GstFlowReturn
gst_avi_mux_stop_file (GstAviMux * avimux)
{
GstFlowReturn res = GST_FLOW_OK;
GstBuffer *header;
GSList *node;
GstSegment segment;
/* if bigfile, rewrite header, else write indexes */
/* don't bail out at once if error, still try to re-write header */
if (avimux->video_pads > 0) {
if (avimux->is_bigfile) {
res = gst_avi_mux_bigfile (avimux, TRUE);
} else {
res = gst_avi_mux_write_index (avimux);
}
}
/* we do our best to make it interleaved at least ... */
if (avimux->audio_pads > 0 && avimux->video_pads > 0)
avimux->avi_hdr.flags |= GST_RIFF_AVIH_ISINTERLEAVED;
/* set rate and everything having to do with that */
avimux->avi_hdr.max_bps = 0;
node = avimux->sinkpads;
while (node) {
GstAviPad *avipad = (GstAviPad *) node->data;
node = node->next;
if (!avipad->is_video) {
GstAviAudioPad *audpad = (GstAviAudioPad *) avipad;
/* calculate bps if needed */
if (!audpad->auds.av_bps) {
if (audpad->audio_time) {
audpad->auds.av_bps =
(GST_SECOND * audpad->audio_size) / audpad->audio_time;
/* round bps to nearest multiple of 8;
* which is much more likely to be the (cbr) bitrate in use;
* which in turn results in better timestamp calculation on playback */
audpad->auds.av_bps = GST_ROUND_UP_8 (audpad->auds.av_bps - 4);
} else {
GST_ELEMENT_WARNING (avimux, STREAM, MUX,
(_("No or invalid input audio, AVI stream will be corrupt.")),
(NULL));
audpad->auds.av_bps = 0;
}
}
gst_avi_mux_audsink_set_fields (avimux, audpad);
avimux->avi_hdr.max_bps += audpad->auds.av_bps;
avipad->hdr.length = gst_util_uint64_scale (audpad->audio_time,
avipad->hdr.rate, avipad->hdr.scale * GST_SECOND);
} else {
GstAviVideoPad *vidpad = (GstAviVideoPad *) avipad;
avimux->avi_hdr.max_bps += ((vidpad->vids.bit_cnt + 7) / 8) *
(1000000. / avimux->avi_hdr.us_frame) * vidpad->vids.image_size;
avipad->hdr.length = avimux->total_frames;
}
}
/* statistics/total_frames/... */
avimux->avi_hdr.tot_frames = avimux->num_frames;
/* seek and rewrite the header */
gst_segment_init (&segment, GST_FORMAT_BYTES);
gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment));
/* the first error survives */
header = gst_avi_mux_riff_get_avi_header (avimux);
if (res == GST_FLOW_OK)
res = gst_pad_push (avimux->srcpad, header);
else
gst_pad_push (avimux->srcpad, header);
segment.start = avimux->total_data;
segment.time = avimux->total_data;
gst_pad_push_event (avimux->srcpad, gst_event_new_segment (&segment));
avimux->write_header = TRUE;
return res;
}
static GstFlowReturn
gst_avi_mux_restart_file (GstAviMux * avimux)
{
GstFlowReturn res;
if ((res = gst_avi_mux_stop_file (avimux)) != GST_FLOW_OK)
return res;
gst_pad_push_event (avimux->srcpad, gst_event_new_eos ());
return gst_avi_mux_start_file (avimux);
}
/* handle events (search) */
static gboolean
gst_avi_mux_handle_event (GstCollectPads * pads, GstCollectData * data,
GstEvent * event, gpointer user_data)
{
GstAviMux *avimux;
gboolean ret = TRUE;
avimux = GST_AVI_MUX (user_data);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
GstAviCollectData *collect_pad;
GstAviVideoPad *avipad;
gst_event_parse_caps (event, &caps);
/* find stream data */
collect_pad = (GstAviCollectData *) data;
g_assert (collect_pad);
avipad = (GstAviVideoPad *) collect_pad->avipad;
g_assert (avipad);
if (avipad->parent.is_video) {
ret = gst_avi_mux_vidsink_set_caps (data->pad, caps);
} else {
ret = gst_avi_mux_audsink_set_caps (data->pad, caps);
}
gst_event_unref (event);
event = NULL;
break;
}
case GST_EVENT_TAG:{
GstTagList *list;
GstTagSetter *setter = GST_TAG_SETTER (avimux);
const GstTagMergeMode mode = gst_tag_setter_get_tag_merge_mode (setter);
gst_event_parse_tag (event, &list);
gst_tag_setter_merge_tags (setter, list, mode);
gst_event_unref (event);
event = NULL;
break;
}
default:
break;
}
if (event != NULL)
return gst_collect_pads_event_default (pads, data, event, FALSE);
return ret;
}
/* send extra 'padding' data */
static GstFlowReturn
gst_avi_mux_send_pad_data (GstAviMux * avimux, gulong num_bytes)
{
GstBuffer *buffer;
buffer = gst_buffer_new_and_alloc (num_bytes);
gst_buffer_memset (buffer, 0, 0, num_bytes);
return gst_pad_push (avimux->srcpad, buffer);
}
/* do buffer */
static GstFlowReturn
gst_avi_mux_do_buffer (GstAviMux * avimux, GstAviPad * avipad)
{
GstFlowReturn res;
GstBuffer *data, *header;
gulong total_size, pad_bytes = 0;
guint flags;
gsize datasize;
data = gst_collect_pads_pop (avimux->collect, avipad->collect);
/* arrange downstream running time */
data = gst_buffer_make_writable (data);
GST_BUFFER_TIMESTAMP (data) =
gst_segment_to_running_time (&avipad->collect->segment,
GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (data));
/* Prepend a special buffer to the first one for some formats */
if (avipad->is_video) {
GstAviVideoPad *vidpad = (GstAviVideoPad *) avipad;
if (vidpad->prepend_buffer) {
GstBuffer *newdata =
gst_buffer_append (vidpad->prepend_buffer, gst_buffer_ref (data));
gst_buffer_copy_into (newdata, data, GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
gst_buffer_unref (data);
data = newdata;
vidpad->prepend_buffer = NULL;
}
}
if (avimux->restart) {
if ((res = gst_avi_mux_restart_file (avimux)) != GST_FLOW_OK)
return res;
}
datasize = gst_buffer_get_size (data);
/* need to restart or start a next avix chunk ? */
if ((avimux->is_bigfile ? avimux->datax_size : avimux->data_size) +
datasize > GST_AVI_MAX_SIZE) {
if (avimux->enable_large_avi) {
if ((res = gst_avi_mux_bigfile (avimux, FALSE)) != GST_FLOW_OK)
return res;
} else {
if ((res = gst_avi_mux_restart_file (avimux)) != GST_FLOW_OK)
return res;
}
}
/* get header and record some stats */
if (datasize & 1) {
pad_bytes = 2 - (datasize & 1);
}
header = gst_avi_mux_riff_get_header (avipad, datasize);
total_size = gst_buffer_get_size (header) + datasize + pad_bytes;
if (avimux->is_bigfile) {
avimux->datax_size += total_size;
} else {
avimux->data_size += total_size;
}
if (G_UNLIKELY (avipad->hook))
avipad->hook (avimux, avipad, data);
/* the suggested buffer size is the max frame size */
if (avipad->hdr.bufsize < datasize)
avipad->hdr.bufsize = datasize;
if (avipad->is_video) {
avimux->total_frames++;
if (avimux->is_bigfile) {
avimux->numx_frames++;
} else {
avimux->num_frames++;
}
flags = 0x02;
if (!GST_BUFFER_FLAG_IS_SET (data, GST_BUFFER_FLAG_DELTA_UNIT))
flags |= 0x10;
} else {
GstAviAudioPad *audpad = (GstAviAudioPad *) avipad;
flags = 0;
audpad->audio_size += datasize;
audpad->audio_time += GST_BUFFER_DURATION (data);
}
gst_avi_mux_add_index (avimux, avipad, flags, datasize);
/* send buffers */
GST_LOG_OBJECT (avimux, "pushing buffers: head, data");
if ((res = gst_pad_push (avimux->srcpad, header)) != GST_FLOW_OK)
return res;
if ((res = gst_pad_push (avimux->srcpad, data)) != GST_FLOW_OK)
return res;
if (pad_bytes) {
if ((res = gst_avi_mux_send_pad_data (avimux, pad_bytes)) != GST_FLOW_OK)
return res;
}
/* if any push above fails, we're in trouble with file consistency anyway */
avimux->total_data += total_size;
avimux->idx_offset += total_size;
return res;
}
/* pick the oldest buffer from the pads and push it */
static GstFlowReturn
gst_avi_mux_do_one_buffer (GstAviMux * avimux)
{
GstAviPad *avipad, *best_pad;
GSList *node;
GstBuffer *buffer;
GstClockTime time, best_time, delay;
node = avimux->sinkpads;
best_pad = NULL;
best_time = GST_CLOCK_TIME_NONE;
for (; node; node = node->next) {
avipad = (GstAviPad *) node->data;
if (!avipad->collect)
continue;
if (!avipad->hdr.fcc_handler)
goto not_negotiated;
buffer = gst_collect_pads_peek (avimux->collect, avipad->collect);
if (!buffer)
continue;
time = GST_BUFFER_TIMESTAMP (buffer);
gst_buffer_unref (buffer);
/* invalid should pass */
if (G_LIKELY (GST_CLOCK_TIME_IS_VALID (time))) {
time = gst_segment_to_running_time (&avipad->collect->segment,
GST_FORMAT_TIME, time);
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (time))) {
GST_DEBUG_OBJECT (avimux, "clipping buffer on pad %s outside segment",
GST_PAD_NAME (avipad->collect->pad));
buffer = gst_collect_pads_pop (avimux->collect, avipad->collect);
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
}
delay = avipad->is_video ? GST_SECOND / 2 : 0;
/* invalid timestamp buffers pass first,
* these are probably initialization buffers */
if (best_pad == NULL || !GST_CLOCK_TIME_IS_VALID (time)
|| (GST_CLOCK_TIME_IS_VALID (best_time) && time + delay < best_time)) {
best_pad = avipad;
best_time = time + delay;
}
}
if (best_pad) {
GST_LOG_OBJECT (avimux, "selected pad %s with time %" GST_TIME_FORMAT,
GST_PAD_NAME (best_pad->collect->pad), GST_TIME_ARGS (best_time));
return gst_avi_mux_do_buffer (avimux, best_pad);
} else {
/* simply finish off the file and send EOS */
gst_avi_mux_stop_file (avimux);
gst_pad_push_event (avimux->srcpad, gst_event_new_eos ());
return GST_FLOW_EOS;
}
/* ERRORS */
not_negotiated:
{
GST_ELEMENT_ERROR (avimux, CORE, NEGOTIATION, (NULL),
("pad %s not negotiated", GST_PAD_NAME (avipad->collect->pad)));
return GST_FLOW_NOT_NEGOTIATED;
}
}
static GstFlowReturn
gst_avi_mux_collect_pads (GstCollectPads * pads, GstAviMux * avimux)
{
GstFlowReturn res;
if (G_UNLIKELY (avimux->write_header)) {
if ((res = gst_avi_mux_start_file (avimux)) != GST_FLOW_OK)
return res;
}
return gst_avi_mux_do_one_buffer (avimux);
}
static void
gst_avi_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstAviMux *avimux;
avimux = GST_AVI_MUX (object);
switch (prop_id) {
case ARG_BIGFILE:
g_value_set_boolean (value, avimux->enable_large_avi);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_avi_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstAviMux *avimux;
avimux = GST_AVI_MUX (object);
switch (prop_id) {
case ARG_BIGFILE:
avimux->enable_large_avi = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_avi_mux_change_state (GstElement * element, GstStateChange transition)
{
GstAviMux *avimux;
GstStateChangeReturn ret;
avimux = GST_AVI_MUX (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_collect_pads_start (avimux->collect);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_collect_pads_stop (avimux->collect);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto done;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_avi_mux_reset (avimux);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
done:
return ret;
}
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