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Allow to override zlib compression level in PNG encoder via avctx->compression_level 

Originally committed as revision 10699 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2007-10-09 15:33:19 +00:00
parent f6e3c4603d
commit 9ba718e481
1 changed files with 5 additions and 1 deletions
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6
libavcodec/pngenc.c
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@ -144,6 +144,7 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
AVFrame * const p= (AVFrame*)&s->picture; AVFrame * const p= (AVFrame*)&s->picture;
int bit_depth, color_type, y, len, row_size, ret, is_progressive; int bit_depth, color_type, y, len, row_size, ret, is_progressive;
int bits_per_pixel, pass_row_size; int bits_per_pixel, pass_row_size;
int compression_level;
uint8_t *ptr; uint8_t *ptr;
uint8_t *crow_buf = NULL; uint8_t *crow_buf = NULL;
uint8_t *tmp_buf = NULL; uint8_t *tmp_buf = NULL;
@ -187,7 +188,10 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
s->zstream.zalloc = ff_png_zalloc; s->zstream.zalloc = ff_png_zalloc;
s->zstream.zfree = ff_png_zfree; s->zstream.zfree = ff_png_zfree;
s->zstream.opaque = NULL; s->zstream.opaque = NULL;
ret = deflateInit2(&s->zstream, Z_DEFAULT_COMPRESSION, compression_level = avctx->compression_level == FF_COMPRESSION_DEFAULT ?
Z_DEFAULT_COMPRESSION :
av_clip(avctx->compression_level, 0, 9);
ret = deflateInit2(&s->zstream, compression_level,
Z_DEFLATED, 15, 8, Z_DEFAULT_STRATEGY); Z_DEFLATED, 15, 8, Z_DEFAULT_STRATEGY);
if (ret != Z_OK) if (ret != Z_OK)
return -1; return -1;