generic-library/ffmpeg
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fixing apiexample

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Originally committed as revision 958 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-09-19 18:24:52 +00:00
parent b71901e6ee
commit e8b62df6e4
2 changed files with 22 additions and 15 deletions
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30
libavcodec/apiexample.c
View File

@ -19,7 +19,7 @@
void audio_encode_example(const char *filename) void audio_encode_example(const char *filename)
{ {
AVCodec *codec; AVCodec *codec;
AVCodecContext codec_context, *c = &codec_context; AVCodecContext *c= NULL;
int frame_size, i, j, out_size, outbuf_size; int frame_size, i, j, out_size, outbuf_size;
FILE *f; FILE *f;
short *samples; short *samples;
@ -35,9 +35,8 @@ void audio_encode_example(const char *filename)
exit(1); exit(1);
} }
/* put default values */ c= avcodec_alloc_context();
memset(c, 0, sizeof(*c));
/* put sample parameters */ /* put sample parameters */
c->bit_rate = 64000; c->bit_rate = 64000;
c->sample_rate = 44100; c->sample_rate = 44100;
@ -79,6 +78,7 @@ void audio_encode_example(const char *filename)
free(samples); free(samples);
avcodec_close(c); avcodec_close(c);
free(c);
} }
/* /*
@ -87,7 +87,7 @@ void audio_encode_example(const char *filename)
void audio_decode_example(const char *outfilename, const char *filename) void audio_decode_example(const char *outfilename, const char *filename)
{ {
AVCodec *codec; AVCodec *codec;
AVCodecContext codec_context, *c = &codec_context; AVCodecContext *c= NULL;
int out_size, size, len; int out_size, size, len;
FILE *f, *outfile; FILE *f, *outfile;
UINT8 *outbuf; UINT8 *outbuf;
@ -102,8 +102,7 @@ void audio_decode_example(const char *outfilename, const char *filename)
exit(1); exit(1);
} }
/* put default values */ c= avcodec_alloc_context();
memset(c, 0, sizeof(*c));
/* open it */ /* open it */
if (avcodec_open(c, codec) < 0) { if (avcodec_open(c, codec) < 0) {
@ -120,7 +119,7 @@ void audio_decode_example(const char *outfilename, const char *filename)
} }
outfile = fopen(outfilename, "w"); outfile = fopen(outfilename, "w");
if (!outfile) { if (!outfile) {
fprintf(stderr, "could not open %s\n", outfilename); free(c);
exit(1); exit(1);
} }
@ -153,6 +152,7 @@ void audio_decode_example(const char *outfilename, const char *filename)
free(outbuf); free(outbuf);
avcodec_close(c); avcodec_close(c);
free(c);
} }
/* /*
@ -161,7 +161,7 @@ void audio_decode_example(const char *outfilename, const char *filename)
void video_encode_example(const char *filename) void video_encode_example(const char *filename)
{ {
AVCodec *codec; AVCodec *codec;
AVCodecContext codec_context, *c = &codec_context; AVCodecContext *c= NULL;
int i, out_size, size, x, y, outbuf_size; int i, out_size, size, x, y, outbuf_size;
FILE *f; FILE *f;
AVPicture picture; AVPicture picture;
@ -176,9 +176,8 @@ void video_encode_example(const char *filename)
exit(1); exit(1);
} }
/* put default values */ c= avcodec_alloc_context();
memset(c, 0, sizeof(*c));
/* put sample parameters */ /* put sample parameters */
c->bit_rate = 400000; c->bit_rate = 400000;
/* resolution must be a multiple of two */ /* resolution must be a multiple of two */
@ -251,6 +250,7 @@ void video_encode_example(const char *filename)
free(outbuf); free(outbuf);
avcodec_close(c); avcodec_close(c);
free(c);
printf("\n"); printf("\n");
} }
@ -273,7 +273,7 @@ void pgm_save(unsigned char *buf,int wrap, int xsize,int ysize,char *filename)
void video_decode_example(const char *outfilename, const char *filename) void video_decode_example(const char *outfilename, const char *filename)
{ {
AVCodec *codec; AVCodec *codec;
AVCodecContext codec_context, *c = &codec_context; AVCodecContext *c= NULL;
int frame, size, got_picture, len; int frame, size, got_picture, len;
FILE *f; FILE *f;
AVPicture picture; AVPicture picture;
@ -289,8 +289,7 @@ void video_decode_example(const char *outfilename, const char *filename)
exit(1); exit(1);
} }
/* put default values */ c= avcodec_alloc_context();
memset(c, 0, sizeof(*c));
/* for some codecs, such as msmpeg4 and mpeg4, width and height /* for some codecs, such as msmpeg4 and mpeg4, width and height
MUST be initialized there because these info are not available MUST be initialized there because these info are not available
@ -375,6 +374,7 @@ void video_decode_example(const char *outfilename, const char *filename)
fclose(f); fclose(f);
avcodec_close(c); avcodec_close(c);
free(c);
printf("\n"); printf("\n");
} }

7
libavcodec/utils.c
View File

@ -50,10 +50,17 @@ void register_avcodec(AVCodec *format)
} }
void avcodec_get_context_defaults(AVCodecContext *s){ void avcodec_get_context_defaults(AVCodecContext *s){
s->bit_rate= 800*1000;
s->bit_rate_tolerance= s->bit_rate*10;
s->qmin= 2; s->qmin= 2;
s->qmax= 31; s->qmax= 31;
s->rc_eq= "tex^qComp"; s->rc_eq= "tex^qComp";
s->qcompress= 0.5; s->qcompress= 0.5;
s->max_qdiff= 3;
s->b_quant_factor=1.25;
s->b_quant_offset=1.25;
s->i_quant_factor=0.8;
s->i_quant_offset=0.0;
} }
/** /**