[FFmpeg-cvslog] aacenc: Store channel count in AACEncContext.
Nathan Caldwell
git at videolan.org
Tue Jan 24 03:04:45 CET 2012
ffmpeg | branch: master | Nathan Caldwell <saintdev at gmail.com> | Wed Dec 7 15:20:10 2011 -0700| [04af2efaae661fd48334bab52f6561450a403f20] | committer: Alex Converse
aacenc: Store channel count in AACEncContext.
Signed-off-by: Alex Converse <alex.converse at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=04af2efaae661fd48334bab52f6561450a403f20
---
libavcodec/aacenc.c | 42 ++++++++++++++++++++++--------------------
libavcodec/aacenc.h | 1 +
2 files changed, 23 insertions(+), 20 deletions(-)
diff --git a/libavcodec/aacenc.c b/libavcodec/aacenc.c
index 8356ca8..a25edeb 100644
--- a/libavcodec/aacenc.c
+++ b/libavcodec/aacenc.c
@@ -155,7 +155,7 @@ static void put_audio_specific_config(AVCodecContext *avctx)
init_put_bits(&pb, avctx->extradata, avctx->extradata_size*8);
put_bits(&pb, 5, 2); //object type - AAC-LC
put_bits(&pb, 4, s->samplerate_index); //sample rate index
- put_bits(&pb, 4, avctx->channels);
+ put_bits(&pb, 4, s->channels);
//GASpecificConfig
put_bits(&pb, 1, 0); //frame length - 1024 samples
put_bits(&pb, 1, 0); //does not depend on core coder
@@ -168,11 +168,11 @@ static void put_audio_specific_config(AVCodecContext *avctx)
flush_put_bits(&pb);
}
-static void apply_window_and_mdct(AVCodecContext *avctx, AACEncContext *s,
- SingleChannelElement *sce, float *audio)
+static void apply_window_and_mdct(AACEncContext *s, SingleChannelElement *sce,
+ float *audio)
{
int i, k;
- const int chans = avctx->channels;
+ const int chans = s->channels;
const float * lwindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_long_1024 : ff_sine_1024;
const float * swindow = sce->ics.use_kb_window[0] ? ff_aac_kbd_short_128 : ff_sine_128;
const float * pwindow = sce->ics.use_kb_window[1] ? ff_aac_kbd_short_128 : ff_sine_128;
@@ -446,11 +446,11 @@ static int aac_encode_frame(AVCodecContext *avctx,
return 0;
if (data) {
if (!s->psypp) {
- memcpy(s->samples + 1024 * avctx->channels, data,
- 1024 * avctx->channels * sizeof(s->samples[0]));
+ memcpy(s->samples + 1024 * s->channels, data,
+ 1024 * s->channels * sizeof(s->samples[0]));
} else {
start_ch = 0;
- samples2 = s->samples + 1024 * avctx->channels;
+ samples2 = s->samples + 1024 * s->channels;
for (i = 0; i < s->chan_map[0]; i++) {
tag = s->chan_map[i+1];
chans = tag == TYPE_CPE ? 2 : 1;
@@ -461,8 +461,8 @@ static int aac_encode_frame(AVCodecContext *avctx,
}
}
if (!avctx->frame_number) {
- memcpy(s->samples, s->samples + 1024 * avctx->channels,
- 1024 * avctx->channels * sizeof(s->samples[0]));
+ memcpy(s->samples, s->samples + 1024 * s->channels,
+ 1024 * s->channels * sizeof(s->samples[0]));
return 0;
}
@@ -476,7 +476,7 @@ static int aac_encode_frame(AVCodecContext *avctx,
IndividualChannelStream *ics = &cpe->ch[ch].ics;
int cur_channel = start_ch + ch;
samples2 = samples + cur_channel;
- la = samples2 + (448+64) * avctx->channels;
+ la = samples2 + (448+64) * s->channels;
if (!data)
la = NULL;
if (tag == TYPE_LFE) {
@@ -504,7 +504,7 @@ static int aac_encode_frame(AVCodecContext *avctx,
for (w = 0; w < ics->num_windows; w++)
ics->group_len[w] = wi[ch].grouping[w];
- apply_window_and_mdct(avctx, s, &cpe->ch[ch], samples2);
+ apply_window_and_mdct(s, &cpe->ch[ch], samples2);
}
start_ch += chans;
}
@@ -570,8 +570,8 @@ static int aac_encode_frame(AVCodecContext *avctx,
}
frame_bits = put_bits_count(&s->pb);
- if (frame_bits <= 6144 * avctx->channels - 3) {
- s->psy.bitres.bits = frame_bits / avctx->channels;
+ if (frame_bits <= 6144 * s->channels - 3) {
+ s->psy.bitres.bits = frame_bits / s->channels;
break;
}
@@ -592,8 +592,8 @@ static int aac_encode_frame(AVCodecContext *avctx,
if (!data)
s->last_frame = 1;
- memcpy(s->samples, s->samples + 1024 * avctx->channels,
- 1024 * avctx->channels * sizeof(s->samples[0]));
+ memcpy(s->samples, s->samples + 1024 * s->channels,
+ 1024 * s->channels * sizeof(s->samples[0]));
return put_bits_count(&s->pb)>>3;
}
@@ -633,7 +633,7 @@ static av_cold int dsp_init(AVCodecContext *avctx, AACEncContext *s)
static av_cold int alloc_buffers(AVCodecContext *avctx, AACEncContext *s)
{
- FF_ALLOC_OR_GOTO (avctx, s->samples, 2 * 1024 * avctx->channels * sizeof(s->samples[0]), alloc_fail);
+ FF_ALLOC_OR_GOTO (avctx, s->samples, 2 * 1024 * s->channels * sizeof(s->samples[0]), alloc_fail);
FF_ALLOCZ_OR_GOTO(avctx, s->cpe, sizeof(ChannelElement) * s->chan_map[0], alloc_fail);
FF_ALLOCZ_OR_GOTO(avctx, avctx->extradata, 5 + FF_INPUT_BUFFER_PADDING_SIZE, alloc_fail);
@@ -656,18 +656,20 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
if (avctx->sample_rate == avpriv_mpeg4audio_sample_rates[i])
break;
+ s->channels = avctx->channels;
+
ERROR_IF(i == 16,
"Unsupported sample rate %d\n", avctx->sample_rate);
- ERROR_IF(avctx->channels > AAC_MAX_CHANNELS,
- "Unsupported number of channels: %d\n", avctx->channels);
+ ERROR_IF(s->channels > AAC_MAX_CHANNELS,
+ "Unsupported number of channels: %d\n", s->channels);
ERROR_IF(avctx->profile != FF_PROFILE_UNKNOWN && avctx->profile != FF_PROFILE_AAC_LOW,
"Unsupported profile %d\n", avctx->profile);
- ERROR_IF(1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * avctx->channels,
+ ERROR_IF(1024.0 * avctx->bit_rate / avctx->sample_rate > 6144 * s->channels,
"Too many bits per frame requested\n");
s->samplerate_index = i;
- s->chan_map = aac_chan_configs[avctx->channels-1];
+ s->chan_map = aac_chan_configs[s->channels-1];
if (ret = dsp_init(avctx, s))
goto fail;
diff --git a/libavcodec/aacenc.h b/libavcodec/aacenc.h
index 79d542f..211c70a 100644
--- a/libavcodec/aacenc.h
+++ b/libavcodec/aacenc.h
@@ -61,6 +61,7 @@ typedef struct AACEncContext {
float *samples; ///< saved preprocessed input
int samplerate_index; ///< MPEG-4 samplerate index
+ int channels; ///< channel count
const uint8_t *chan_map; ///< channel configuration map
ChannelElement *cpe; ///< channel elements
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