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examples/transcode_aac: properly select the output sample format

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Makes the example work with all the supported AAC encoders.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Andreas Unterweger 2015-01-27 08:58:47 +01:00 committed by Anton Khirnov
parent 443b71928b
commit 749a89d1b8
1 changed files with 9 additions and 7 deletions
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16
doc/examples/transcode_aac.c
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@ -40,11 +40,9 @@
#include "libavresample/avresample.h"
/** The output bit rate in kbit/s */
#define OUTPUT_BIT_RATE 48000
#define OUTPUT_BIT_RATE 96000
/** The number of output channels */
#define OUTPUT_CHANNELS 2
/** The audio sample output format */
#define OUTPUT_SAMPLE_FORMAT AV_SAMPLE_FMT_S16
/**
* Convert an error code into a text message.
@ -178,9 +176,12 @@ static int open_output_file(const char *filename,
(*output_codec_context)->channels = OUTPUT_CHANNELS;
(*output_codec_context)->channel_layout = av_get_default_channel_layout(OUTPUT_CHANNELS);
(*output_codec_context)->sample_rate = input_codec_context->sample_rate;
(*output_codec_context)->sample_fmt = AV_SAMPLE_FMT_S16;
(*output_codec_context)->sample_fmt = output_codec->sample_fmts[0];
(*output_codec_context)->bit_rate = OUTPUT_BIT_RATE;
/** Allow the use of the experimental AAC encoder */
(*output_codec_context)->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
/**
* Some container formats (like MP4) require global headers to be present
* Mark the encoder so that it behaves accordingly.
@ -276,10 +277,11 @@ static int init_resampler(AVCodecContext *input_codec_context,
}
/** Initialize a FIFO buffer for the audio samples to be encoded. */
static int init_fifo(AVAudioFifo **fifo)
static int init_fifo(AVAudioFifo **fifo, AVCodecContext *output_codec_context)
{
/** Create the FIFO buffer based on the specified output sample format. */
if (!(*fifo = av_audio_fifo_alloc(OUTPUT_SAMPLE_FORMAT, OUTPUT_CHANNELS, 1))) {
if (!(*fifo = av_audio_fifo_alloc(output_codec_context->sample_fmt,
output_codec_context->channels, 1))) {
fprintf(stderr, "Could not allocate FIFO\n");
return AVERROR(ENOMEM);
}
@ -673,7 +675,7 @@ int main(int argc, char **argv)
&resample_context))
goto cleanup;
/** Initialize the FIFO buffer to store audio samples to be encoded. */
if (init_fifo(&fifo))
if (init_fifo(&fifo, output_codec_context))
goto cleanup;
/** Write the header of the output file container. */
if (write_output_file_header(output_format_context))