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audio: let libavresample do channel reordering

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This commit is contained in:
wm4 2013-04-06 00:56:01 +02:00
parent b20026c29b
commit 408b7eecee
1 changed files with 49 additions and 3 deletions
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52
audio/filter/af_lavrresample.c
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@ -43,6 +43,7 @@
#define avresample_available(x) 0
#define avresample_convert(ctx, out, out_planesize, out_samples, in, in_planesize, in_samples) \
swr_convert(ctx, out, out_samples, (const uint8_t**)(in), in_samples)
#define avresample_set_channel_mapping swr_set_channel_mapping
#else
#error "config.h broken"
#endif
@ -69,8 +70,14 @@ struct af_resample_opts {
struct af_resample {
int allow_detach;
struct AVAudioResampleContext *avrctx;
struct AVAudioResampleContext *avrctx_out; // for output channel reordering
struct af_resample_opts ctx; // opts in the context
struct af_resample_opts opts; // opts requested by the user
// At least libswresample keeps a pointer around for this:
int reorder_in[MP_NUM_CHANNELS];
int reorder_out[MP_NUM_CHANNELS];
bool need_reorder_out;
uint8_t *reorder_buffer;
};
#ifdef CONFIG_LIBAVRESAMPLE
@ -154,6 +161,7 @@ static int control(struct af_instance *af, int cmd, void *arg)
if (needs_lavrctx_reconfigure(s, in, out)) {
avresample_close(s->avrctx);
avresample_close(s->avrctx_out);
s->ctx.out_rate = out->rate;
s->ctx.in_rate = in->rate;
@ -185,7 +193,32 @@ static int control(struct af_instance *af, int cmd, void *arg)
ctx_opt_set_dbl("cutoff", s->ctx.cutoff);
if (avresample_open(s->avrctx) < 0) {
struct mp_chmap in_lavc;
mp_chmap_from_lavc(&in_lavc, in_ch_layout);
mp_chmap_get_reorder(s->reorder_in, &in->channels, &in_lavc);
struct mp_chmap out_lavc;
mp_chmap_from_lavc(&out_lavc, out_ch_layout);
mp_chmap_get_reorder(s->reorder_out, &out_lavc, &out->channels);
s->need_reorder_out = !mp_chmap_equals(&out_lavc, &out->channels);
// Same configuration; we just reorder.
av_opt_set_int(s->avrctx_out, "in_channel_layout", out_ch_layout, 0);
av_opt_set_int(s->avrctx_out, "out_channel_layout", out_ch_layout, 0);
av_opt_set_int(s->avrctx_out, "in_sample_fmt", out_samplefmt, 0);
av_opt_set_int(s->avrctx_out, "out_sample_fmt", out_samplefmt, 0);
av_opt_set_int(s->avrctx_out, "in_sample_rate", s->ctx.out_rate, 0);
av_opt_set_int(s->avrctx_out, "out_sample_rate", s->ctx.out_rate, 0);
// API has weird requirements, quoting avresample.h:
// * This function can only be called when the allocated context is not open.
// * Also, the input channel layout must have already been set.
avresample_set_channel_mapping(s->avrctx, s->reorder_in);
avresample_set_channel_mapping(s->avrctx_out, s->reorder_out);
if (avresample_open(s->avrctx) < 0 ||
avresample_open(s->avrctx_out) < 0)
{
mp_msg(MSGT_AFILTER, MSGL_ERR, "[lavrresample] Cannot open "
"Libavresample Context. \n");
return AF_ERROR;
@ -246,6 +279,8 @@ static void uninit(struct af_instance *af)
struct af_resample *s = af->setup;
if (s->avrctx)
avresample_close(s->avrctx);
if (s->avrctx_out)
avresample_close(s->avrctx_out);
talloc_free(af->setup);
}
}
@ -275,8 +310,18 @@ static struct mp_audio *play(struct af_instance *af, struct mp_audio *data)
(uint8_t **) &out->audio, out_size, out_samples,
(uint8_t **) &in->audio, in_size, in_samples);
out->len = out->bps * out_samples * out->nch;
*data = *out;
if (s->need_reorder_out) {
if (talloc_get_size(s->reorder_buffer) < out_size)
s->reorder_buffer = talloc_realloc_size(s, s->reorder_buffer, out_size);
data->audio = s->reorder_buffer;
out_samples = avresample_convert(s->avrctx_out,
(uint8_t **) &data->audio, out_size, out_samples,
(uint8_t **) &out->audio, out_size, out_samples);
}
data->len = out->bps * out_samples * out->nch;
return data;
}
@ -303,9 +348,10 @@ static int af_open(struct af_instance *af)
s->allow_detach = 1;
s->avrctx = avresample_alloc_context();
s->avrctx_out = avresample_alloc_context();
af->setup = s;
if (s->avrctx) {
if (s->avrctx && s->avrctx_out) {
return AF_OK;
} else {
mp_msg(MSGT_AFILTER, MSGL_ERR, "[lavrresample] Cannot initialize "