#include "avcodec.h"
#include "get_bits.h"
#include "bytestream.h"
+#include "internal.h"
#include "tscc2data.h"
typedef struct TSCC2Context {
AVCodecContext *avctx;
- AVFrame pic;
+ AVFrame *pic;
int mb_width, mb_height;
uint8_t *slice_quants;
int quant[2];
#define DCT1D(d0, d1, d2, d3, s0, s1, s2, s3, OP) \
OP(d0, 5 * ((s0) + (s1) + (s2)) + 2 * (s3)); \
OP(d1, 5 * ((s0) - (s2) - (s3)) + 2 * (s1)); \
- OP(d2, 5 * ((s0) - (s2) + (s3)) - 2 * (s3)); \
+ OP(d2, 5 * ((s0) - (s2) + (s3)) - 2 * (s1)); \
OP(d3, 5 * ((s0) - (s1) + (s2)) - 2 * (s3)); \
#define COL_OP(a, b) a = b
-#define ROW_OP(a, b) a = av_clip_uint8((((b) + 0x20) >> 6) + 0x80)
+#define ROW_OP(a, b) a = ((b) + 0x20) >> 6
static void tscc2_idct4_put(int *in, int q[3], uint8_t *dst, int stride)
{
}
dc = (dc + prev_dc) & 0xFF;
prev_dc = dc;
- c->block[0] = dc - 0x80;
+ c->block[0] = dc;
nc = get_vlc2(gb, c->nc_vlc[vlc_set].table, 9, 1);
if (nc == -1)
if (ac == 0x1000)
ac = get_bits(gb, 12);
bpos += ac & 0xF;
- if (bpos >= 64)
+ if (bpos >= 16)
return AVERROR_INVALIDDATA;
val = sign_extend(ac >> 4, 8);
c->block[tscc2_zigzag[bpos++]] = val;
if (q == 0 || q == 3) // skip block
continue;
for (i = 0; i < 3; i++) {
- off = mb_x * 16 + mb_y * 8 * c->pic.linesize[i];
+ off = mb_x * 16 + mb_y * 8 * c->pic->linesize[i];
ret = tscc2_decode_mb(c, c->q[q - 1], c->quant[q - 1] - 2,
- c->pic.data[i] + off, c->pic.linesize[i], i);
+ c->pic->data[i] + off, c->pic->linesize[i], i);
if (ret)
return ret;
}
}
static int tscc2_decode_frame(AVCodecContext *avctx, void *data,
- int *data_size, AVPacket *avpkt)
+ int *got_frame, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
return AVERROR_INVALIDDATA;
}
- c->pic.reference = 3;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
- FF_BUFFER_HINTS_REUSABLE;
- if ((ret = avctx->reget_buffer(avctx, &c->pic)) < 0) {
+ if ((ret = ff_reget_buffer(avctx, c->pic)) < 0) {
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return ret;
}
if (frame_type == 0) {
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = c->pic;
+ *got_frame = 1;
+ if ((ret = av_frame_ref(data, c->pic)) < 0)
+ return ret;
return buf_size;
}
if (!size) {
int skip_row = 1, j, off = i * c->mb_width;
for (j = 0; j < c->mb_width; j++) {
- if (c->slice_quants[off + i] == 1 ||
- c->slice_quants[off + i] == 2) {
+ if (c->slice_quants[off + j] == 1 ||
+ c->slice_quants[off + j] == 2) {
skip_row = 0;
break;
}
bytestream2_skip(&gb, size);
}
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = c->pic;
+ *got_frame = 1;
+ if ((ret = av_frame_ref(data, c->pic)) < 0)
+ return ret;
/* always report that the buffer was completely consumed */
return buf_size;
}
+static av_cold int tscc2_decode_end(AVCodecContext *avctx)
+{
+ TSCC2Context * const c = avctx->priv_data;
+
+ av_frame_free(&c->pic);
+ av_freep(&c->slice_quants);
+ free_vlcs(c);
+
+ return 0;
+}
+
static av_cold int tscc2_decode_init(AVCodecContext *avctx)
{
TSCC2Context * const c = avctx->priv_data;
c->avctx = avctx;
- avctx->pix_fmt = PIX_FMT_YUV444P;
+ avctx->pix_fmt = AV_PIX_FMT_YUV444P;
if ((ret = init_vlcs(c)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Cannot initialise VLCs\n");
return AVERROR(ENOMEM);
}
- avctx->coded_frame = &c->pic;
-
- return 0;
-}
-
-static av_cold int tscc2_decode_end(AVCodecContext *avctx)
-{
- TSCC2Context * const c = avctx->priv_data;
-
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
- av_freep(&c->slice_quants);
- free_vlcs(c);
+ c->pic = av_frame_alloc();
+ if (!c->pic) {
+ tscc2_decode_end(avctx);
+ return AVERROR(ENOMEM);
+ }
return 0;
}
AVCodec ff_tscc2_decoder = {
.name = "tscc2",
+ .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Codec 2"),
.type = AVMEDIA_TYPE_VIDEO,
- .id = CODEC_ID_TSCC2,
+ .id = AV_CODEC_ID_TSCC2,
.priv_data_size = sizeof(TSCC2Context),
.init = tscc2_decode_init,
.close = tscc2_decode_end,
.decode = tscc2_decode_frame,
.capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Codec 2"),
};