static void mad_decode_data (audio_decoder_t *this_gen, buf_element_t *buf) {
mad_decoder_t *this = (mad_decoder_t *) this_gen;
int bytes_in_buffer_at_pts;
lprintf ("decode data, size: %d, decoder_flags: %d\n", buf->size, buf->decoder_flags);
if (buf->size>(INPUT_BUF_SIZE-this->bytes_in_buffer)) {
xprintf (this->xstream->xine, XINE_VERBOSITY_DEBUG,
"libmad: ALERT input buffer too small (%d bytes, %d avail)!\n",
buf->size, INPUT_BUF_SIZE-this->bytes_in_buffer);
buf->size = INPUT_BUF_SIZE-this->bytes_in_buffer;
}
if ((buf->decoder_flags & BUF_FLAG_HEADER) == 0) {
/* reset decoder on leaving preview mode */
if ((buf->decoder_flags & BUF_FLAG_PREVIEW) == 0) {
if (this->preview_mode) {
mad_reset (this_gen);
}
} else {
this->preview_mode = 1;
}
bytes_in_buffer_at_pts = this->bytes_in_buffer;
xine_fast_memcpy (&this->buffer[this->bytes_in_buffer],
buf->content, buf->size);
this->bytes_in_buffer += buf->size;
/*
printf ("libmad: decode data - doing it\n");
*/
mad_stream_buffer (&this->stream, this->buffer,
this->bytes_in_buffer);
if (this->bytes_in_buffer < MAD_MIN_SIZE && buf->pts == 0)
return;
if (!this->needs_more_data) {
this->pts = buf->pts;
if (buf->decoder_flags & BUF_FLAG_AUDIO_PADDING) {
this->start_padding = buf->decoder_info[1];
this->end_padding = buf->decoder_info[2];
} else {
this->start_padding = 0;
this->end_padding = 0;
}
}
while (1) {
if (mad_frame_decode (&this->frame, &this->stream) != 0) {
if (this->stream.next_frame) {
int num_bytes =
this->buffer + this->bytes_in_buffer - this->stream.next_frame;
/* printf("libmad: MAD_ERROR_BUFLEN\n"); */
memmove(this->buffer, this->stream.next_frame, num_bytes);
this->bytes_in_buffer = num_bytes;
}
switch (this->stream.error) {
case MAD_ERROR_BUFLEN:
/* libmad wants more data */
this->needs_more_data = 1;
return;
default:
lprintf ("error 0x%04X, mad_stream_buffer %d bytes\n", this->stream.error, this->bytes_in_buffer);
mad_stream_buffer (&this->stream, this->buffer,
this->bytes_in_buffer);
}
} else {
int mode = (this->frame.header.mode == MAD_MODE_SINGLE_CHANNEL) ? AO_CAP_MODE_MONO : AO_CAP_MODE_STEREO;
if (!this->output_open
|| (this->output_sampling_rate != this->frame.header.samplerate)
|| (this->output_mode != mode)) {
lprintf ("audio sample rate %d mode %08x\n", this->frame.header.samplerate, mode);
/* the mpeg audio demuxer can set audio bitrate */
if (! _x_stream_info_get(this->xstream, XINE_STREAM_INFO_AUDIO_BITRATE)) {
_x_stream_info_set(this->xstream, XINE_STREAM_INFO_AUDIO_BITRATE,
this->frame.header.bitrate);
}
/* the mpeg audio demuxer can set this meta info */
if (! _x_meta_info_get(this->xstream, XINE_META_INFO_AUDIOCODEC)) {
switch (this->frame.header.layer) {
case MAD_LAYER_I:
_x_meta_info_set_utf8(this->xstream, XINE_META_INFO_AUDIOCODEC,
"MPEG audio layer 1 (lib: MAD)");
break;
case MAD_LAYER_II:
_x_meta_info_set_utf8(this->xstream, XINE_META_INFO_AUDIOCODEC,
"MPEG audio layer 2 (lib: MAD)");
break;
case MAD_LAYER_III:
_x_meta_info_set_utf8(this->xstream, XINE_META_INFO_AUDIOCODEC,
"MPEG audio layer 3 (lib: MAD)");
break;
default:
_x_meta_info_set_utf8(this->xstream, XINE_META_INFO_AUDIOCODEC,
"MPEG audio (lib: MAD)");
}
}
if (this->output_open) {
this->xstream->audio_out->close (this->xstream->audio_out, this->xstream);
this->output_open = 0;
}
if (!this->output_open) {
this->output_open = (this->xstream->audio_out->open) (this->xstream->audio_out,
this->xstream, 16,
this->frame.header.samplerate,
mode) ;
}
if (!this->output_open) {
return;
}
this->output_sampling_rate = this->frame.header.samplerate;
this->output_mode = mode;
}
mad_synth_frame (&this->synth, &this->frame);
if ( (buf->decoder_flags & BUF_FLAG_PREVIEW) == 0 ) {
unsigned int nchannels, nsamples;
mad_fixed_t const *left_ch, *right_ch;
struct mad_pcm *pcm = &this->synth.pcm;
audio_buffer_t *audio_buffer;
uint16_t *output;
int bitrate;
int pts_offset;
audio_buffer = this->xstream->audio_out->get_buffer (this->xstream->audio_out);
output = audio_buffer->mem;
nchannels = pcm->channels;
nsamples = pcm->length;
left_ch = pcm->samples[0];
right_ch = pcm->samples[1];
/* padding */
if (this->start_padding || this->end_padding) {
/* check padding validity */
if (nsamples < (this->start_padding + this->end_padding)) {
lprintf("invalid padding data");
this->start_padding = 0;
this->end_padding = 0;
}
lprintf("nsamples=%d, start_padding=%d, end_padding=%d\n",
nsamples, this->start_padding, this->end_padding);
nsamples -= this->start_padding + this->end_padding;
left_ch += this->start_padding;
right_ch += this->start_padding;
}
audio_buffer->num_frames = nsamples;
audio_buffer->vpts = this->pts;
while (nsamples--) {
/* output sample(s) in 16-bit signed little-endian PCM */
*output++ = scale(*left_ch++);
if (nchannels == 2)
*output++ = scale(*right_ch++);
}
audio_buffer->num_frames = pcm->length;
/* pts computing */
if (this->frame.header.bitrate > 0) {
bitrate = this->frame.header.bitrate;
} else {
bitrate = _x_stream_info_get(this->xstream, XINE_STREAM_INFO_AUDIO_BITRATE);
lprintf("offset %d bps\n", bitrate);
}
audio_buffer->vpts = buf->pts;
if (audio_buffer->vpts && (bitrate > 0)) {
pts_offset = (bytes_in_buffer_at_pts * 8 * 90) / (bitrate / 1000);
lprintf("pts: %"PRId64", offset: %d pts, %d bytes\n", buf->pts, pts_offset, bytes_in_buffer_at_pts);
if (audio_buffer->vpts < pts_offset)
pts_offset = audio_buffer->vpts;
audio_buffer->vpts -= pts_offset;
}
this->xstream->audio_out->put_buffer (this->xstream->audio_out, audio_buffer, this->xstream);
this->pts = buf->pts;
buf->pts = 0;
if (buf->decoder_flags & BUF_FLAG_AUDIO_PADDING) {
this->start_padding = buf->decoder_info[1];
this->end_padding = buf->decoder_info[2];
buf->decoder_info[1] = 0;
buf->decoder_info[2] = 0;
} else {
this->start_padding = 0;
this->end_padding = 0;
}
}
lprintf ("decode worked\n");
}
}
}
}
static void mad_decode_data (audio_decoder_t *this_gen, buf_element_t *buf) {
mad_decoder_t *this = (mad_decoder_t *) this_gen;
#ifdef LOG
printf ("libmad: decode data, decoder_flags: %d\n", buf->decoder_flags);
#endif
if (buf->size>(INPUT_BUF_SIZE-this->bytes_in_buffer)) {
printf ("libmad: ALERT input buffer too small (%d bytes, %d avail)!\n",
buf->size, INPUT_BUF_SIZE-this->bytes_in_buffer);
buf->size = INPUT_BUF_SIZE-this->bytes_in_buffer;
}
if ((buf->decoder_flags & BUF_FLAG_HEADER) == 0) {
/* reset decoder on leaving preview mode */
if ((buf->decoder_flags & BUF_FLAG_PREVIEW) == 0) {
if (this->preview_mode) {
mad_reset (this_gen);
}
} else {
this->preview_mode = 1;
}
xine_fast_memcpy (&this->buffer[this->bytes_in_buffer],
buf->content, buf->size);
this->bytes_in_buffer += buf->size;
/*
printf ("libmad: decode data - doing it\n");
*/
mad_stream_buffer (&this->stream, this->buffer,
this->bytes_in_buffer);
while (1) {
if (mad_frame_decode (&this->frame, &this->stream) != 0) {
if (this->stream.next_frame) {
int num_bytes =
this->buffer + this->bytes_in_buffer - this->stream.next_frame;
/* printf("libmad: MAD_ERROR_BUFLEN\n"); */
memmove(this->buffer, this->stream.next_frame, num_bytes);
this->bytes_in_buffer = num_bytes;
}
switch (this->stream.error) {
case MAD_ERROR_BUFLEN:
return;
default:
mad_stream_buffer (&this->stream, this->buffer,
this->bytes_in_buffer);
}
} else {
int mode = (this->frame.header.mode == MAD_MODE_SINGLE_CHANNEL) ? AO_CAP_MODE_MONO : AO_CAP_MODE_STEREO;
if (!this->output_open
|| (this->output_sampling_rate != this->frame.header.samplerate)
|| (this->output_mode != mode)) {
#ifdef LOG
printf ("libmad: audio sample rate %d mode %08x\n",
this->frame.header.samplerate,
mode);
#endif
this->xstream->stream_info[XINE_STREAM_INFO_AUDIO_BITRATE] = this->frame.header.bitrate;
switch (this->frame.header.layer) {
case MAD_LAYER_I:
this->xstream->meta_info[XINE_META_INFO_AUDIOCODEC]
= strdup ("MPEG audio layer 1");
break;
case MAD_LAYER_II:
this->xstream->meta_info[XINE_META_INFO_AUDIOCODEC]
= strdup ("MPEG audio layer 2");
break;
case MAD_LAYER_III:
this->xstream->meta_info[XINE_META_INFO_AUDIOCODEC]
= strdup ("MPEG audio layer 3");
break;
default:
this->xstream->meta_info[XINE_META_INFO_AUDIOCODEC]
= strdup ("MPEG audio");
}
if (this->output_open) {
this->xstream->audio_out->close (this->xstream->audio_out, this->xstream);
this->output_open = 0;
}
if (!this->output_open) {
this->output_open = this->xstream->audio_out->open(this->xstream->audio_out,
this->xstream, 16,
this->frame.header.samplerate,
mode) ;
}
if (!this->output_open) {
return;
}
this->output_sampling_rate = this->frame.header.samplerate;
this->output_mode = mode;
}
mad_synth_frame (&this->synth, &this->frame);
if ( (buf->decoder_flags & BUF_FLAG_PREVIEW) == 0 ) {
unsigned int nchannels, nsamples;
mad_fixed_t const *left_ch, *right_ch;
struct mad_pcm *pcm = &this->synth.pcm;
audio_buffer_t *audio_buffer;
uint16_t *output;
audio_buffer = this->xstream->audio_out->get_buffer (this->xstream->audio_out);
output = audio_buffer->mem;
nchannels = pcm->channels;
nsamples = pcm->length;
left_ch = pcm->samples[0];
right_ch = pcm->samples[1];
while (nsamples--) {
/* output sample(s) in 16-bit signed little-endian PCM */
*output++ = scale(*left_ch++);
if (nchannels == 2)
*output++ = scale(*right_ch++);
}
audio_buffer->num_frames = pcm->length;
audio_buffer->vpts = buf->pts;
this->xstream->audio_out->put_buffer (this->xstream->audio_out, audio_buffer, this->xstream);
buf->pts = 0;
}
#ifdef LOG
printf ("libmad: decode worked\n");
#endif
}
}
}
}
