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af_lavcac3enc: fix buffering timestamps calculations 

In theory, an encoder could buffer some data.
This commit is contained in:
wm4 2016-08-01 19:59:59 +02:00
parent 2e3db648b5
commit 251299da4f
1 changed files with 9 additions and 3 deletions
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12
audio/filter/af_lavcac3enc.c
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@ -57,6 +57,7 @@ typedef struct af_ac3enc_s {
struct mp_audio *pending; // unconsumed input data
int in_samples; // samples of input per AC3 frame
int out_samples; // upper bound on encoded output per AC3 frame
int64_t encoder_buffered;
int cfg_add_iec61937_header;
int cfg_bit_rate;
@ -168,6 +169,7 @@ static int control(struct af_instance *af, int cmd, void *arg)
s->in_samples = s->lavc_actx->frame_size;
mp_audio_realloc(s->input, s->in_samples);
s->input->samples = 0;
s->encoder_buffered = 0;
return AF_OK;
}
case AF_CONTROL_RESET:
@ -176,6 +178,7 @@ static int control(struct af_instance *af, int cmd, void *arg)
talloc_free(s->pending);
s->pending = NULL;
s->input->samples = 0;
s->encoder_buffered = 0;
return AF_OK;
}
return AF_UNKNOWN;
@ -198,8 +201,8 @@ static void uninit(struct af_instance* af)
static void update_delay(struct af_instance *af)
{
af_ac3enc_t *s = af->priv;
af->delay = ((s->pending ? s->pending->samples : 0) + s->input->samples) /
(double)s->input->rate;
af->delay = ((s->pending ? s->pending->samples : 0) + s->input->samples +
s->encoder_buffered) / (double)s->input->rate;
}
static int filter_frame(struct af_instance *af, struct mp_audio *audio)
@ -289,6 +292,7 @@ static int filter_out(struct af_instance *af)
MP_FATAL(af, "Encode failed.\n");
goto done;
}
s->encoder_buffered += s->input->samples;
s->input->samples = 0;
}
int lavc_ret = avcodec_receive_packet(s->lavc_actx, &pkt);
@ -320,6 +324,8 @@ static int filter_out(struct af_instance *af)
MP_DBG(af, "avcodec_encode_audio got %d, pending %d.\n",
pkt.size, s->pending->samples + s->input->samples);
s->encoder_buffered -= AC3_FRAME_SIZE;
struct mp_audio *out =
mp_audio_pool_get(af->out_pool, af->data, s->out_samples);
if (!out)
@ -355,12 +361,12 @@ static int filter_out(struct af_instance *af)
swap_16((uint16_t *)(buf + header_len), pkt.size / 2);
out->samples = frame_size / out->sstride;
af_add_output_frame(af, out);
update_delay(af);
err = 0;
done:
av_packet_unref(&pkt);
av_frame_free(&frame);
update_delay(af);
return err;
}