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af_lavcac3enc: simplify format negotiation

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The format negotiation is the same, except don't confusingly copy the
input format into af->data, just to overwrite it later. af->data should
alwass contain the output format, and the existing code was just a very
misguided use of the af_test_output() helper function.

Just set af->data to the output format immediately, and modify the input
format properly.

Also, if format negotiation fails (and needs another iteration), don't
initialize the libavcodec encoder.
This commit is contained in:
wm4 2013-11-11 12:08:11 +01:00
parent 824e6550f8
commit a72072c605
1 changed files with 33 additions and 28 deletions

61
audio/filter/af_lavcac3enc.c
View File

@ -65,31 +65,37 @@ typedef struct af_ac3enc_s {
static int control(struct af_instance *af, int cmd, void *arg)
{
af_ac3enc_t *s = af->setup;
struct mp_audio *data = arg;
int i, bit_rate, test_output_res;
int i, bit_rate;
static const int default_bit_rate[AC3_MAX_CHANNELS+1] = \
{0, 96000, 192000, 256000, 384000, 448000, 448000};
switch (cmd){
case AF_CONTROL_REINIT:
if (AF_FORMAT_IS_AC3(data->format) || data->nch < s->min_channel_num)
case AF_CONTROL_REINIT: {
struct mp_audio *in = arg;
struct mp_audio orig_in = *in;
if (AF_FORMAT_IS_AC3(in->format) || in->nch < s->min_channel_num)
return AF_DETACH;
mp_audio_set_format(af->data, s->in_sampleformat);
if (data->rate == 48000 || data->rate == 44100 || data->rate == 32000)
af->data->rate = data->rate;
else
af->data->rate = 48000;
if (data->nch > AC3_MAX_CHANNELS)
mp_audio_set_num_channels(af->data, AC3_MAX_CHANNELS);
else
mp_audio_set_channels(af->data, &data->channels);
mp_chmap_reorder_to_lavc(&af->data->channels);
test_output_res = af_test_output(af, data);
mp_audio_set_format(in, s->in_sampleformat);
if (in->rate != 48000 && in->rate != 44100 && in->rate != 32000)
in->rate = 48000;
af->data->rate = in->rate;
mp_chmap_reorder_to_lavc(&in->channels);
if (in->nch > AC3_MAX_CHANNELS)
mp_audio_set_num_channels(in, AC3_MAX_CHANNELS);
mp_audio_set_format(af->data, AF_FORMAT_AC3_BE);
mp_audio_set_num_channels(af->data, 2);
if (!mp_audio_config_equals(in, &orig_in))
return AF_FALSE;
s->pending_len = 0;
int expect_samples = AC3_FRAME_SIZE;
s->expect_len = expect_samples * data->nch * af->data->bps;
s->expect_len = expect_samples * in->nch * in->bps;
assert(s->expect_len <= s->pending_data_size);
if (s->add_iec61937_header)
af->mul = 1;
@ -97,20 +103,20 @@ static int control(struct af_instance *af, int cmd, void *arg)
af->mul = (double)(AC3_MAX_CODED_FRAME_SIZE / (2 * 2)) / expect_samples;
mp_msg(MSGT_AFILTER, MSGL_DBG2, "af_lavcac3enc reinit: %d, %d, %f, %d.\n",
data->nch, data->rate, af->mul, s->expect_len);
in->nch, in->rate, af->mul, s->expect_len);
bit_rate = s->bit_rate ? s->bit_rate : default_bit_rate[af->data->nch];
if (s->lavc_actx->channels != af->data->nch ||
s->lavc_actx->sample_rate != af->data->rate ||
s->lavc_actx->bit_rate != bit_rate) {
bit_rate = s->bit_rate ? s->bit_rate : default_bit_rate[in->nch];
if (s->lavc_actx->channels != in->nch ||
s->lavc_actx->sample_rate != in->rate ||
s->lavc_actx->bit_rate != bit_rate)
{
avcodec_close(s->lavc_actx);
// Put sample parameters
s->lavc_actx->channels = af->data->nch;
s->lavc_actx->channel_layout = mp_chmap_to_lavc(&af->data->channels);
s->lavc_actx->sample_rate = af->data->rate;
s->lavc_actx->channels = in->nch;
s->lavc_actx->channel_layout = mp_chmap_to_lavc(&in->channels);
s->lavc_actx->sample_rate = in->rate;
s->lavc_actx->bit_rate = bit_rate;
if (avcodec_open2(s->lavc_actx, s->lavc_acodec, NULL) < 0) {
@ -123,9 +129,8 @@ static int control(struct af_instance *af, int cmd, void *arg)
"encoder frame size %d\n", s->lavc_actx->frame_size);
return AF_ERROR;
}
mp_audio_set_format(af->data, AF_FORMAT_AC3_BE);
mp_audio_set_num_channels(af->data, 2);
return test_output_res;
return AF_OK;
}
case AF_CONTROL_COMMAND_LINE:
mp_msg(MSGT_AFILTER, MSGL_DBG2, "af_lavcac3enc cmdline: %s.\n", (char*)arg);
s->bit_rate = 0;