static int preinit(sh_audio_t *sh_audio)
{
DMO_AudioDecoder* ds_adec;
int chans=(audio_output_channels==sh_audio->wf->nChannels) ?
audio_output_channels : (sh_audio->wf->nChannels>=2 ? 2 : 1);
if(!(ds_adec=DMO_AudioDecoder_Open(sh_audio->codec->dll,&sh_audio->codec->guid,sh_audio->wf,chans)))
{
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingDLLcodec,sh_audio->codec->dll);
return 0;
}
sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
sh_audio->channels=chans;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
sh_audio->samplesize=2;
sh_audio->audio_in_minsize=4*sh_audio->wf->nBlockAlign;
if(sh_audio->audio_in_minsize<8192) sh_audio->audio_in_minsize=8192;
sh_audio->audio_out_minsize=4*16384;
sh_audio->context = ds_adec;
mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: Win32/DMO audio codec init OK!\n");
return 1;
}
static gboolean
dmo_audiodec_sink_setcaps (GstPad * pad, GstCaps * caps)
{
DMOAudioDec *dec = (DMOAudioDec *) gst_pad_get_parent (pad);
DMOAudioDecClass *klass = (DMOAudioDecClass *) G_OBJECT_GET_CLASS (dec);
GstStructure *s = gst_caps_get_structure (caps, 0);
gchar *dll;
gint size;
WAVEFORMATEX * hdr = NULL;
const GValue *v;
GstBuffer *extradata = NULL;
GstCaps *out;
gboolean ret = FALSE;
guint32 fourcc;
GST_DEBUG_OBJECT (dec, "setcaps called with %" GST_PTR_FORMAT, caps);
Check_FS_Segment ();
if (dec->ctx) {
DMO_AudioDecoder_Destroy (dec->ctx);
dec->ctx = NULL;
}
/* read data */
if (!gst_structure_get_int (s, "bitrate", &dec->bitrate) ||
!gst_structure_get_int (s, "block_align", &dec->block_align) ||
!gst_structure_get_int (s, "rate", &dec->rate) ||
!gst_structure_get_int (s, "channels", &dec->channels) ||
!gst_structure_get_int (s, "depth", &dec->depth)) {
goto beach;
}
if ((v = gst_structure_get_value (s, "codec_data")))
extradata = gst_value_get_buffer (v);
if (!gst_structure_get_fourcc (s, "format", &fourcc))
fourcc = klass->entry->format;
/* set up dll initialization */
dll = g_strdup_printf ("%s.dll", klass->entry->dll);
size = sizeof (WAVEFORMATEX) +
(extradata ? GST_BUFFER_SIZE (extradata) : 0);
hdr = g_malloc0 (size);
if (extradata) { /* Codec data is appended after our header */
memcpy (((guchar *) hdr) + sizeof (WAVEFORMATEX),
GST_BUFFER_DATA (extradata), GST_BUFFER_SIZE (extradata));
hdr->cbSize = GST_BUFFER_SIZE (extradata);
}
hdr->wFormatTag = fourcc;
hdr->nChannels = dec->channels;
hdr->nSamplesPerSec = dec->rate;
hdr->nAvgBytesPerSec = dec->bitrate / 8;
hdr->nBlockAlign = dec->block_align;
hdr->wBitsPerSample = dec->depth;
GST_DEBUG ("Will now open %s using %d bps %d channels", dll, dec->bitrate,
dec->channels);
if (!(dec->ctx = DMO_AudioDecoder_Open (dll, &klass->entry->guid, hdr))) {
GST_ERROR ("Failed to open DLL %s", dll);
g_free (dll);
g_free (hdr);
goto beach;
}
g_free (dll);
g_free (hdr);
DMO_AudioDecoder_GetOutputInfos (dec->ctx, &dec->out_buffer_size,
&dec->out_align);
DMO_AudioDecoder_GetInputInfos (dec->ctx, &dec->in_buffer_size,
&dec->in_align, &dec->lookahead);
/* negotiate output */
out = gst_caps_from_string (klass->entry->srccaps);
gst_caps_set_simple (out,
"width", G_TYPE_INT, dec->depth,
"depth", G_TYPE_INT, dec->depth,
"rate", G_TYPE_INT, dec->rate,
"channels", G_TYPE_INT, dec->channels,
NULL);
if (dec->channels > 2 && dec->channels <= 11) {
GstAudioChannelPosition pos[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT
};
gst_audio_set_channel_positions (gst_caps_get_structure (out, 0), pos);
}
if (!gst_pad_set_caps (dec->srcpad, out)) {
gst_caps_unref (out);
GST_ERROR ("Failed to negotiate output");
goto beach;
}
gst_caps_unref (out);
ret = TRUE;
beach:
gst_object_unref (dec);
return ret;
}
