*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
*/
typedef struct EightBpsContext {
- AVCodecContext *avctx;
- AVFrame pic;
+ AVCodecContext *avctx;
+ AVFrame pic;
- unsigned char planes;
- unsigned char planemap[4];
+ unsigned char planes;
+ unsigned char planemap[4];
} EightBpsContext;
*/
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
{
- EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
- unsigned char *encoded = (unsigned char *)buf;
- unsigned char *pixptr, *pixptr_end;
- unsigned int height = avctx->height; // Real image height
- unsigned int dlen, p, row;
- unsigned char *lp, *dp;
- unsigned char count;
- unsigned int px_inc;
- unsigned int planes = c->planes;
- unsigned char *planemap = c->planemap;
-
-
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
-
- if(c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
-
- c->pic.reference = 0;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
- if(avctx->get_buffer(avctx, &c->pic) < 0){
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
-
- /* Set data pointer after line lengths */
- dp = encoded + planes * (height << 1);
-
- /* Ignore alpha plane, don't know what to do with it */
- if (planes == 4)
- planes--;
-
- px_inc = planes + (avctx->pix_fmt == PIX_FMT_RGBA32);
-
- for (p = 0; p < planes; p++) {
- /* Lines length pointer for this plane */
- lp = encoded + p * (height << 1);
-
- /* Decode a plane */
- for(row = 0; row < height; row++) {
- pixptr = c->pic.data[0] + row * c->pic.linesize[0] + planemap[p];
- pixptr_end = pixptr + c->pic.linesize[0];
- dlen = be2me_16(*(unsigned short *)(lp+row*2));
- /* Decode a row of this plane */
- while(dlen > 0) {
- if ((count = *dp++) <= 127) {
- count++;
- dlen -= count + 1;
- if (pixptr + count * px_inc > pixptr_end)
- break;
- while(count--) {
- *pixptr = *dp++;
- pixptr += px_inc;
- }
- } else {
- count = 257 - count;
- if (pixptr + count * px_inc > pixptr_end)
- break;
- while(count--) {
- *pixptr = *dp;
- pixptr += px_inc;
- }
- dp++;
- dlen -= 2;
- }
- }
- }
- }
-
- if (avctx->palctrl) {
- memcpy (c->pic.data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
- if (avctx->palctrl->palette_changed) {
- c->pic.palette_has_changed = 1;
- avctx->palctrl->palette_changed = 0;
- } else
- c->pic.palette_has_changed = 0;
- }
-
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = c->pic;
-
- /* always report that the buffer was completely consumed */
- return buf_size;
+ EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
+ unsigned char *encoded = (unsigned char *)buf;
+ unsigned char *pixptr, *pixptr_end;
+ unsigned int height = avctx->height; // Real image height
+ unsigned int dlen, p, row;
+ unsigned char *lp, *dp;
+ unsigned char count;
+ unsigned int px_inc;
+ unsigned int planes = c->planes;
+ unsigned char *planemap = c->planemap;
+
+ if(c->pic.data[0])
+ avctx->release_buffer(avctx, &c->pic);
+
+ c->pic.reference = 0;
+ c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
+ if(avctx->get_buffer(avctx, &c->pic) < 0){
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+
+ /* Set data pointer after line lengths */
+ dp = encoded + planes * (height << 1);
+
+ /* Ignore alpha plane, don't know what to do with it */
+ if (planes == 4)
+ planes--;
+
+ px_inc = planes + (avctx->pix_fmt == PIX_FMT_RGBA32);
+
+ for (p = 0; p < planes; p++) {
+ /* Lines length pointer for this plane */
+ lp = encoded + p * (height << 1);
+
+ /* Decode a plane */
+ for(row = 0; row < height; row++) {
+ pixptr = c->pic.data[0] + row * c->pic.linesize[0] + planemap[p];
+ pixptr_end = pixptr + c->pic.linesize[0];
+ dlen = be2me_16(*(unsigned short *)(lp+row*2));
+ /* Decode a row of this plane */
+ while(dlen > 0) {
+ if(dp + 1 >= buf+buf_size) return -1;
+ if ((count = *dp++) <= 127) {
+ count++;
+ dlen -= count + 1;
+ if (pixptr + count * px_inc > pixptr_end)
+ break;
+ if(dp + count > buf+buf_size) return -1;
+ while(count--) {
+ *pixptr = *dp++;
+ pixptr += px_inc;
+ }
+ } else {
+ count = 257 - count;
+ if (pixptr + count * px_inc > pixptr_end)
+ break;
+ while(count--) {
+ *pixptr = *dp;
+ pixptr += px_inc;
+ }
+ dp++;
+ dlen -= 2;
+ }
+ }
+ }
+ }
+
+ if (avctx->palctrl) {
+ memcpy (c->pic.data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
+ if (avctx->palctrl->palette_changed) {
+ c->pic.palette_has_changed = 1;
+ avctx->palctrl->palette_changed = 0;
+ } else
+ c->pic.palette_has_changed = 0;
+ }
+
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = c->pic;
+
+ /* always report that the buffer was completely consumed */
+ return buf_size;
}
*/
static int decode_init(AVCodecContext *avctx)
{
- EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
+ EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
- c->avctx = avctx;
- avctx->has_b_frames = 0;
+ c->avctx = avctx;
+ avctx->has_b_frames = 0;
- c->pic.data[0] = NULL;
+ c->pic.data[0] = NULL;
if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
return 1;
}
- switch (avctx->bits_per_sample) {
- case 8:
- avctx->pix_fmt = PIX_FMT_PAL8;
- c->planes = 1;
- c->planemap[0] = 0; // 1st plane is palette indexes
- if (avctx->palctrl == NULL) {
- av_log(avctx, AV_LOG_ERROR, "Error: PAL8 format but no palette from demuxer.\n");
- return -1;
- }
- break;
- case 24:
- avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24);
- c->planes = 3;
- c->planemap[0] = 2; // 1st plane is red
- c->planemap[1] = 1; // 2nd plane is green
- c->planemap[2] = 0; // 3rd plane is blue
- break;
- case 32:
- avctx->pix_fmt = PIX_FMT_RGBA32;
- c->planes = 4;
+ switch (avctx->bits_per_sample) {
+ case 8:
+ avctx->pix_fmt = PIX_FMT_PAL8;
+ c->planes = 1;
+ c->planemap[0] = 0; // 1st plane is palette indexes
+ if (avctx->palctrl == NULL) {
+ av_log(avctx, AV_LOG_ERROR, "Error: PAL8 format but no palette from demuxer.\n");
+ return -1;
+ }
+ break;
+ case 24:
+ avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24);
+ c->planes = 3;
+ c->planemap[0] = 2; // 1st plane is red
+ c->planemap[1] = 1; // 2nd plane is green
+ c->planemap[2] = 0; // 3rd plane is blue
+ break;
+ case 32:
+ avctx->pix_fmt = PIX_FMT_RGBA32;
+ c->planes = 4;
#ifdef WORDS_BIGENDIAN
- c->planemap[0] = 1; // 1st plane is red
- c->planemap[1] = 2; // 2nd plane is green
- c->planemap[2] = 3; // 3rd plane is blue
- c->planemap[3] = 0; // 4th plane is alpha???
+ c->planemap[0] = 1; // 1st plane is red
+ c->planemap[1] = 2; // 2nd plane is green
+ c->planemap[2] = 3; // 3rd plane is blue
+ c->planemap[3] = 0; // 4th plane is alpha???
#else
- c->planemap[0] = 2; // 1st plane is red
- c->planemap[1] = 1; // 2nd plane is green
- c->planemap[2] = 0; // 3rd plane is blue
- c->planemap[3] = 3; // 4th plane is alpha???
+ c->planemap[0] = 2; // 1st plane is red
+ c->planemap[1] = 1; // 2nd plane is green
+ c->planemap[2] = 0; // 3rd plane is blue
+ c->planemap[3] = 3; // 4th plane is alpha???
#endif
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", avctx->bits_per_sample);
- return -1;
- }
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", avctx->bits_per_sample);
+ return -1;
+ }
return 0;
}
*/
static int decode_end(AVCodecContext *avctx)
{
- EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
+ EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
+ if (c->pic.data[0])
+ avctx->release_buffer(avctx, &c->pic);
- return 0;
+ return 0;
}
AVCodec eightbps_decoder = {
- "8bps",
- CODEC_TYPE_VIDEO,
- CODEC_ID_8BPS,
- sizeof(EightBpsContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
+ "8bps",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_8BPS,
+ sizeof(EightBpsContext),
+ decode_init,
+ NULL,
+ decode_end,
+ decode_frame,
+ CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff