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Code Issues Releases Activity

use avctx->get_buffer

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Originally committed as revision 6765 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2006-10-22 16:10:04 +00:00
parent a7fb3a9600
commit d54d396d08
1 changed files with 28 additions and 16 deletions
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44
libavcodec/gifdec.c
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@ -34,15 +34,15 @@
#define GCE_DISPOSAL_RESTORE 3
typedef struct GifState {
AVFrame picture;
int screen_width;
int screen_height;
int bits_per_pixel;
int background_color_index;
int transparent_color_index;
int color_resolution;
uint8_t *image_buf;
int image_linesize;
uint32_t image_palette[256];
uint32_t *image_palette;
int pix_fmt;
/* after the frame is displayed, the disposal method is used */
@ -272,8 +272,8 @@ static int gif_read_image(GifState *s)
GLZWDecodeInit(s, code_size);
/* read all the image */
linesize = s->image_linesize;
ptr1 = s->image_buf + top * linesize + (left * 3);
linesize = s->picture.linesize[0];
ptr1 = s->picture.data[0] + top * linesize + (left * 3);
ptr = ptr1;
pass = 0;
y1 = 0;
@ -444,6 +444,9 @@ static int gif_decode_init(AVCodecContext *avctx)
{
GifState *s = avctx->priv_data;
avcodec_get_frame_defaults(&s->picture);
avctx->coded_frame= &s->picture;
s->picture.data[0] = NULL;
return 0;
}
@ -459,30 +462,39 @@ static int gif_decode_frame(AVCodecContext *avctx, void *data, int *data_size, u
/* allocate image buffer */
s->image_linesize = s->screen_width * 3;
s->image_buf = av_malloc(s->screen_height * s->image_linesize);
if (!s->image_buf)
return -ENOMEM;
s->pix_fmt = PIX_FMT_PAL8;
/* now we are ready: build format streams */
/* XXX: check if screen size is always valid */
avctx->width = s->screen_width;
avctx->height = s->screen_height;
avctx->pix_fmt = PIX_FMT_PAL8;
if (avcodec_check_dimensions(avctx, s->screen_width, s->screen_height))
return -1;
avcodec_set_dimensions(avctx, s->screen_width, s->screen_height);
if (s->picture.data[0])
avctx->release_buffer(avctx, &s->picture);
if (avctx->get_buffer(avctx, &s->picture) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
s->image_palette = (uint32_t *)s->picture.data[1];
ret = gif_parse_next_image(s);
if (ret < 0)
return ret;
picture->data[0] = s->image_buf;
picture->linesize[0] = s->image_linesize;
picture->data[1] = s->image_palette;
picture->linesize[1] = 4;
*picture = s->picture;
*data_size = sizeof(AVPicture);
return 0;
}
static int gif_decode_close(AVCodecContext *avctx)
{
GifState *s = avctx->priv_data;
if(s->picture.data[0])
avctx->release_buffer(avctx, &s->picture);
return 0;
}
AVCodec gif_decoder = {
"gif",
CODEC_TYPE_VIDEO,
@ -490,6 +502,6 @@ AVCodec gif_decoder = {
sizeof(GifState),
gif_decode_init,
NULL,
NULL,
gif_decode_close,
gif_decode_frame,
};