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mp4ff: moved code to mp4_faad_new()

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Moved the libfaad decoder initialization to mp4_faad_new(), and also
fill the audio_format struct there.  This eliminates a little bit of
complexity in mp4_decode().
This commit is contained in:
Max Kellermann 2009-02-18 18:38:09 +01:00
parent 2bc0fabe73
commit 111c73e701
1 changed files with 65 additions and 53 deletions
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118
src/decoder/mp4ff_plugin.c
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@ -94,6 +94,65 @@ mp4_seek(void *user_data, uint64_t position)
? 0 : -1;
}
static faacDecHandle
mp4_faad_new(mp4ff_t *mp4fh, int track, struct audio_format *audio_format)
{
faacDecHandle decoder;
faacDecConfigurationPtr config;
unsigned char *mp4_buffer;
unsigned int mp4_buffer_size;
uint32_t sample_rate;
#ifdef HAVE_FAAD_LONG
/* neaacdec.h declares all arguments as "unsigned long", but
internally expects uint32_t pointers. To avoid gcc
warnings, use this workaround. */
unsigned long *sample_rate_r = (unsigned long*)&sample_rate;
#else
uint32_t *sample_rate_r = &sample_rate;
#endif
unsigned char channels;
decoder = faacDecOpen();
config = faacDecGetCurrentConfiguration(decoder);
config->outputFormat = FAAD_FMT_16BIT;
#ifdef HAVE_FAACDECCONFIGURATION_DOWNMATRIX
config->downMatrix = 1;
#endif
#ifdef HAVE_FAACDECCONFIGURATION_DONTUPSAMPLEIMPLICITSBR
config->dontUpSampleImplicitSBR = 0;
#endif
faacDecSetConfiguration(decoder, config);
mp4_buffer = NULL;
mp4_buffer_size = 0;
mp4ff_get_decoder_config(mp4fh, track, &mp4_buffer, &mp4_buffer_size);
if (faacDecInit2(decoder, mp4_buffer, mp4_buffer_size,
sample_rate_r, &channels) < 0) {
g_warning("Not an AAC stream.\n");
faacDecClose(decoder);
return NULL;
}
*audio_format = (struct audio_format){
.bits = 16,
.channels = channels,
.sample_rate = sample_rate,
};
if (!audio_format_valid(audio_format)) {
g_warning("Invalid audio format: %u:%u:%u\n",
audio_format->sample_rate,
audio_format->bits,
audio_format->channels);
faacDecClose(decoder);
return NULL;
}
return decoder;
}
static void
mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
{
@ -113,19 +172,8 @@ mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
faacDecHandle decoder;
struct audio_format audio_format;
faacDecFrameInfo frame_info;
faacDecConfigurationPtr config;
unsigned char *mp4_buffer;
unsigned int mp4_buffer_size;
uint32_t sample_rate;
#ifdef HAVE_FAAD_LONG
/* neaacdec.h declares all arguments as "unsigned long", but
internally expects uint32_t pointers. To avoid gcc
warnings, use this workaround. */
unsigned long *sample_rate_r = (unsigned long*)&sample_rate;
#else
uint32_t *sample_rate_r = &sample_rate;
#endif
unsigned char channels;
long sample_id;
long num_samples;
long dur;
@ -155,26 +203,8 @@ mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
return;
}
decoder = faacDecOpen();
config = faacDecGetCurrentConfiguration(decoder);
config->outputFormat = FAAD_FMT_16BIT;
#ifdef HAVE_FAACDECCONFIGURATION_DOWNMATRIX
config->downMatrix = 1;
#endif
#ifdef HAVE_FAACDECCONFIGURATION_DONTUPSAMPLEIMPLICITSBR
config->dontUpSampleImplicitSBR = 0;
#endif
faacDecSetConfiguration(decoder, config);
mp4_buffer = NULL;
mp4_buffer_size = 0;
mp4ff_get_decoder_config(mp4fh, track, &mp4_buffer, &mp4_buffer_size);
if (faacDecInit2(decoder, mp4_buffer, mp4_buffer_size,
sample_rate_r, &channels) < 0) {
g_warning("Not an AAC stream.\n");
faacDecClose(decoder);
decoder = mp4_faad_new(mp4fh, track, &audio_format);
if (decoder == NULL) {
mp4ff_close(mp4fh);
return;
}
@ -182,8 +212,6 @@ mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
file_time = mp4ff_get_track_duration_use_offsets(mp4fh, track);
scale = mp4ff_time_scale(mp4fh, track);
free(mp4_buffer);
if (scale < 0) {
g_warning("Error getting audio format of mp4 AAC track.\n");
faacDecClose(decoder);
@ -204,22 +232,6 @@ mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
seek_table = g_malloc(sizeof(float) * num_samples);
audio_format = (struct audio_format){
.bits = 16,
.channels = channels,
.sample_rate = sample_rate,
};
if (!audio_format_valid(&audio_format)) {
g_warning("Invalid audio format: %u:%u:%u\n",
audio_format.sample_rate,
audio_format.bits,
audio_format.channels);
faacDecClose(decoder);
mp4ff_close(mp4fh);
return;
}
decoder_initialized(mpd_decoder, &audio_format,
input_stream->seekable,
total_time);
@ -303,12 +315,12 @@ mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
}
#endif
if (channels * (unsigned long)(dur + offset) > frame_info.samples) {
dur = frame_info.samples / channels;
if (audio_format.channels * (unsigned long)(dur + offset) > frame_info.samples) {
dur = frame_info.samples / audio_format.channels;
offset = 0;
}
sample_count = (unsigned long)(dur * channels);
sample_count = (unsigned long)(dur * audio_format.channels);
if (sample_count > 0) {
initial = 0;
@ -319,7 +331,7 @@ mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
sample_buffer_length = sample_count * 2;
sample_buffer += offset * channels * 2;
sample_buffer += offset * audio_format.channels * 2;
cmd = decoder_data(mpd_decoder, input_stream,
sample_buffer, sample_buffer_length,