diff options
author | Fabrice Bellard <fabrice@bellard.org> | 2003-08-08 22:03:31 +0400 |
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committer | Fabrice Bellard <fabrice@bellard.org> | 2003-08-08 22:03:31 +0400 |
commit | cb750e331b4e457e053c09e164344fc94aed5ec6 (patch) | |
tree | cd33f76117db488e2bbc1a8b85d4b041d116e96b | |
parent | 12f996edfab67b65af0ff1ee829f9eeabb025b0f (diff) |
added get_audio_frame()
Originally committed as revision 2116 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r-- | output_example.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/output_example.c b/output_example.c index 0e06b0cbb6..42153f1103 100644 --- a/output_example.c +++ b/output_example.c @@ -115,21 +115,33 @@ void open_audio(AVFormatContext *oc, AVStream *st) samples = malloc(audio_input_frame_size * 2 * c->channels); } +/* prepare a 16 bit dummy audio frame of 'frame_size' samples and + 'nb_channels' channels */ +void get_audio_frame(int16_t *samples, int frame_size, int nb_channels) +{ + int j, i, v; + int16_t *q; + + q = samples; + for(j=0;j<frame_size;j++) { + v = (int)(sin(t) * 10000); + for(i = 0; i < nb_channels; i++) + *q++ = v; + t += tincr; + tincr += tincr2; + } +} + void write_audio_frame(AVFormatContext *oc, AVStream *st) { - int j, out_size; + int out_size; AVCodecContext *c; c = &st->codec; - for(j=0;j<audio_input_frame_size;j++) { - samples[2*j] = (int)(sin(t) * 10000); - samples[2*j+1] = samples[2*j]; - t += tincr; - tincr += tincr2; - } - + get_audio_frame(samples, audio_input_frame_size, c->channels); + out_size = avcodec_encode_audio(c, audio_outbuf, audio_outbuf_size, samples); /* write the compressed frame in the media file */ |