MrBesen/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Support filters and decoders that dont support negative linesizes.

Browse Source 
This patch is based on work by stefano.

Originally committed as revision 26108 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-12-27 15:10:21 +00:00
parent 9e99f84f7d
commit 0ccabeeaef
4 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
ffplay.c
View File

@ -1616,6 +1616,9 @@ static int input_get_buffer(AVCodecContext *codec, AVFrame *pic)
int i, w, h, stride[4];
unsigned edge;
if (codec->codec->capabilities & CODEC_CAP_NEG_LINESIZES)
perms |= AV_PERM_NEG_LINESIZES;
if(pic->buffer_hints & FF_BUFFER_HINTS_VALID) {
if(pic->buffer_hints & FF_BUFFER_HINTS_READABLE) perms |= AV_PERM_READ;
if(pic->buffer_hints & FF_BUFFER_HINTS_PRESERVE) perms |= AV_PERM_PRESERVE;

11
libavfilter/avfilter.c
View File

@ -197,12 +197,13 @@ int avfilter_config_links(AVFilterContext *filter)
char *ff_get_ref_perms_string(char *buf, size_t buf_size, int perms)
{
snprintf(buf, buf_size, "%s%s%s%s%s",
snprintf(buf, buf_size, "%s%s%s%s%s%s",
perms & AV_PERM_READ ? "r" : "",
perms & AV_PERM_WRITE ? "w" : "",
perms & AV_PERM_PRESERVE ? "p" : "",
perms & AV_PERM_REUSE ? "u" : "",
perms & AV_PERM_REUSE2 ? "U" : "");
perms & AV_PERM_REUSE2 ? "U" : "",
perms & AV_PERM_NEG_LINESIZES ? "n" : "");
return buf;
}
@ -360,15 +361,17 @@ void avfilter_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
{
void (*start_frame)(AVFilterLink *, AVFilterBufferRef *);
AVFilterPad *dst = link->dstpad;
int perms = picref->perms;
FF_DPRINTF_START(NULL, start_frame); ff_dprintf_link(NULL, link, 0); dprintf(NULL, " "); ff_dprintf_ref(NULL, picref, 1);
if (!(start_frame = dst->start_frame))
start_frame = avfilter_default_start_frame;
if (picref->linesize[0] < 0)
perms |= AV_PERM_NEG_LINESIZES;
/* prepare to copy the picture if it has insufficient permissions */
if ((dst->min_perms & picref->perms) != dst->min_perms ||
dst->rej_perms & picref->perms) {
if ((dst->min_perms & perms) != dst->min_perms || dst->rej_perms & perms) {
av_log(link->dst, AV_LOG_DEBUG,
"frame copy needed (have perms %x, need %x, reject %x)\n",
picref->perms,

1
libavfilter/avfilter.h
View File

@ -87,6 +87,7 @@ typedef struct AVFilterBuffer {
#define AV_PERM_PRESERVE 0x04 ///< nobody else can overwrite the buffer
#define AV_PERM_REUSE 0x08 ///< can output the buffer multiple times, with the same contents each time
#define AV_PERM_REUSE2 0x10 ///< can output the buffer multiple times, modified each time
#define AV_PERM_NEG_LINESIZES 0x20 ///< the buffer requested can have negative linesizes
/**
* Audio specific properties in a reference to an AVFilterBuffer. Since

6
libavfilter/vf_vflip.c
View File

@ -43,11 +43,13 @@ static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
int w, int h)
{
FlipContext *flip = link->dst->priv;
AVFilterBufferRef *picref;
int i;
AVFilterBufferRef *picref = avfilter_get_video_buffer(link->dst->outputs[0],
perms, w, h);
if (!(perms & AV_PERM_NEG_LINESIZES))
return avfilter_default_get_video_buffer(link, perms, w, h);
picref = avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
for (i = 0; i < 4; i ++) {
int vsub = i == 1 || i == 2 ? flip->vsub : 0;