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flvdemux: use aac codec-data to adjust samplerate if needed
Based on patch by Fabien Lebaillif-Delamare <fabien@arq-media.com> Fixes #636621.
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8ca094795a
commit
6f8ce30c20
2 changed files with 29 additions and 7 deletions
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@ -1,9 +1,9 @@
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plugin_LTLIBRARIES = libgstflv.la
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libgstflv_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CFLAGS)
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libgstflv_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) $(GST_BASE_LIBS) $(GST_LIBS) \
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-lgstpbutils-@GST_MAJORMINOR@
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libgstflv_la_LDFLAGS = ${GST_PLUGIN_LDFLAGS}
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libgstflv_la_LIBADD = -lgstpbutils-@GST_MAJORMINOR@ \
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$(GST_PLUGINS_BASE_LIBS) $(GST_BASE_LIBS) $(GST_LIBS)
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libgstflv_la_LDFLAGS = ${GST_PLUGIN_LDFLAGS}
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libgstflv_la_SOURCES = gstflvdemux.c gstflvmux.c
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libgstflv_la_LIBTOOLFLAGS = --tag=disable-static
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@ -40,6 +40,7 @@
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#include <string.h>
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#include <gst/base/gstbytereader.h>
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#include <gst/pbutils/descriptions.h>
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#include <gst/pbutils/pbutils.h>
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static GstStaticPadTemplate flv_sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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@ -575,6 +576,7 @@ gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
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GstCaps *caps = NULL;
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gchar *codec_name = NULL;
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gboolean ret = FALSE;
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guint adjusted_rate = rate;
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switch (codec_tag) {
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case 1:
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@ -603,9 +605,29 @@ gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
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caps = gst_caps_new_simple ("audio/x-nellymoser", NULL);
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break;
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case 10:
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{
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/* use codec-data to extract and verify samplerate */
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if (demux->audio_codec_data &&
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GST_BUFFER_SIZE (demux->audio_codec_data) >= 2) {
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gint freq_index;
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freq_index =
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((GST_READ_UINT16_BE (GST_BUFFER_DATA (demux->audio_codec_data))));
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freq_index = (freq_index & 0x0780) >> 7;
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adjusted_rate =
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gst_codec_utils_aac_get_sample_rate_from_index (freq_index);
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if (adjusted_rate && (rate != adjusted_rate)) {
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GST_LOG_OBJECT (demux, "Ajusting AAC sample rate %d -> %d", rate,
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adjusted_rate);
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} else {
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adjusted_rate = rate;
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}
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}
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caps = gst_caps_new_simple ("audio/mpeg",
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"mpegversion", G_TYPE_INT, 4, "framed", G_TYPE_BOOLEAN, TRUE, NULL);
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break;
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}
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case 7:
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caps = gst_caps_new_simple ("audio/x-alaw", NULL);
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break;
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@ -624,8 +646,8 @@ gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
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goto beach;
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}
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gst_caps_set_simple (caps,
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"rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels, NULL);
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gst_caps_set_simple (caps, "rate", G_TYPE_INT, adjusted_rate,
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"channels", G_TYPE_INT, channels, NULL);
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if (demux->audio_codec_data) {
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gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER,
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@ -635,7 +657,7 @@ gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
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ret = gst_pad_set_caps (demux->audio_pad, caps);
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if (G_LIKELY (ret)) {
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/* Store the caps we have set */
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/* Store the caps we got from tags */
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demux->audio_codec_tag = codec_tag;
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demux->rate = rate;
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demux->channels = channels;
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@ -851,7 +873,7 @@ gst_flv_demux_parse_tag_audio (GstFlvDemux * demux, GstBuffer * buffer)
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switch (aac_packet_type) {
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case 0:
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{
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/* AudioSpecificConfic data */
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/* AudioSpecificConfig data */
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GST_LOG_OBJECT (demux, "got an AAC codec data packet");
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if (demux->audio_codec_data) {
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gst_buffer_unref (demux->audio_codec_data);
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