* @author Peter Ross <pross@xvid.org>
*/
+#include "libavutil/intreadwrite.h"
+
#include "avcodec.h"
-#include "dsputil.h"
-#include "get_bits.h"
+#include "bitstream.h"
+#include "blockdsp.h"
#include "internal.h"
-#include "libavutil/intreadwrite.h"
typedef struct JvContext {
- DSPContext dsp;
- AVFrame frame;
+ BlockDSPContext bdsp;
+ AVFrame *frame;
uint32_t palette[AVPALETTE_COUNT];
int palette_has_changed;
} JvContext;
static av_cold int decode_init(AVCodecContext *avctx)
{
JvContext *s = avctx->priv_data;
+
+ if (!avctx->width || !avctx->height ||
+ (avctx->width & 7) || (avctx->height & 7)) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid video dimensions: %dx%d\n",
+ avctx->width, avctx->height);
+ return AVERROR(EINVAL);
+ }
+
+ s->frame = av_frame_alloc();
+ if (!s->frame)
+ return AVERROR(ENOMEM);
+
avctx->pix_fmt = AV_PIX_FMT_PAL8;
- ff_dsputil_init(&s->dsp, avctx);
+ ff_blockdsp_init(&s->bdsp, avctx);
return 0;
}
/**
* Decode 2x2 block
*/
-static inline void decode2x2(GetBitContext *gb, uint8_t *dst, int linesize)
+static inline void decode2x2(BitstreamContext *bc, uint8_t *dst, int linesize)
{
int i, j, v[2];
- switch (get_bits(gb, 2)) {
+ switch (bitstream_read(bc, 2)) {
case 1:
- v[0] = get_bits(gb, 8);
+ v[0] = bitstream_read(bc, 8);
for (j = 0; j < 2; j++)
- memset(dst + j*linesize, v[0], 2);
+ memset(dst + j * linesize, v[0], 2);
break;
case 2:
- v[0] = get_bits(gb, 8);
- v[1] = get_bits(gb, 8);
+ v[0] = bitstream_read(bc, 8);
+ v[1] = bitstream_read(bc, 8);
for (j = 0; j < 2; j++)
for (i = 0; i < 2; i++)
- dst[j*linesize + i] = v[get_bits1(gb)];
+ dst[j * linesize + i] = v[bitstream_read_bit(bc)];
break;
case 3:
for (j = 0; j < 2; j++)
for (i = 0; i < 2; i++)
- dst[j*linesize + i] = get_bits(gb, 8);
+ dst[j * linesize + i] = bitstream_read(bc, 8);
}
}
/**
* Decode 4x4 block
*/
-static inline void decode4x4(GetBitContext *gb, uint8_t *dst, int linesize)
+static inline void decode4x4(BitstreamContext *bc, uint8_t *dst, int linesize)
{
int i, j, v[2];
- switch (get_bits(gb, 2)) {
+ switch (bitstream_read(bc, 2)) {
case 1:
- v[0] = get_bits(gb, 8);
+ v[0] = bitstream_read(bc, 8);
for (j = 0; j < 4; j++)
- memset(dst + j*linesize, v[0], 4);
+ memset(dst + j * linesize, v[0], 4);
break;
case 2:
- v[0] = get_bits(gb, 8);
- v[1] = get_bits(gb, 8);
+ v[0] = bitstream_read(bc, 8);
+ v[1] = bitstream_read(bc, 8);
for (j = 2; j >= 0; j -= 2) {
for (i = 0; i < 4; i++)
- dst[j*linesize + i] = v[get_bits1(gb)];
+ dst[j * linesize + i] = v[bitstream_read_bit(bc)];
for (i = 0; i < 4; i++)
- dst[(j+1)*linesize + i] = v[get_bits1(gb)];
+ dst[(j + 1) * linesize + i] = v[bitstream_read_bit(bc)];
}
break;
case 3:
for (j = 0; j < 4; j += 2)
for (i = 0; i < 4; i += 2)
- decode2x2(gb, dst + j*linesize + i, linesize);
+ decode2x2(bc, dst + j * linesize + i, linesize);
}
}
/**
* Decode 8x8 block
*/
-static inline void decode8x8(GetBitContext *gb, uint8_t *dst, int linesize, DSPContext *dsp)
+static inline void decode8x8(BitstreamContext *bc, uint8_t *dst, int linesize,
+ BlockDSPContext *bdsp)
{
int i, j, v[2];
- switch (get_bits(gb, 2)) {
+ switch (bitstream_read(bc, 2)) {
case 1:
- v[0] = get_bits(gb, 8);
- dsp->fill_block_tab[1](dst, v[0], linesize, 8);
+ v[0] = bitstream_read(bc, 8);
+ bdsp->fill_block_tab[1](dst, v[0], linesize, 8);
break;
case 2:
- v[0] = get_bits(gb, 8);
- v[1] = get_bits(gb, 8);
+ v[0] = bitstream_read(bc, 8);
+ v[1] = bitstream_read(bc, 8);
for (j = 7; j >= 0; j--)
- for (i = 0; i < 8; i++)
- dst[j*linesize + i] = v[get_bits1(gb)];
+ for (i = 0; i < 8; i++)
+ dst[j * linesize + i] = v[bitstream_read_bit(bc)];
break;
case 3:
for (j = 0; j < 8; j += 4)
for (i = 0; i < 8; i += 4)
- decode4x4(gb, dst + j*linesize + i, linesize);
+ decode4x4(bc, dst + j * linesize + i, linesize);
}
}
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
+static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
- JvContext *s = avctx->priv_data;
- int buf_size = avpkt->size;
- const uint8_t *buf = avpkt->data;
+ JvContext *s = avctx->priv_data;
+ int buf_size = avpkt->size;
+ const uint8_t *buf = avpkt->data;
const uint8_t *buf_end = buf + buf_size;
int video_size, video_type, i, j, ret;
buf += 5;
if (video_size) {
- if ((ret = ff_reget_buffer(avctx, &s->frame)) < 0) {
+ if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
if (video_type == 0 || video_type == 1) {
- GetBitContext gb;
- init_get_bits(&gb, buf, 8 * FFMIN(video_size, buf_end - buf));
+ BitstreamContext bc;
+ bitstream_init(&bc, buf, 8 * FFMIN(video_size, buf_end - buf));
for (j = 0; j < avctx->height; j += 8)
for (i = 0; i < avctx->width; i += 8)
- decode8x8(&gb, s->frame.data[0] + j*s->frame.linesize[0] + i,
- s->frame.linesize[0], &s->dsp);
+ decode8x8(&bc,
+ s->frame->data[0] + j * s->frame->linesize[0] + i,
+ s->frame->linesize[0], &s->bdsp);
buf += video_size;
} else if (video_type == 2) {
if (buf + 1 <= buf_end) {
int v = *buf++;
for (j = 0; j < avctx->height; j++)
- memset(s->frame.data[0] + j*s->frame.linesize[0], v, avctx->width);
+ memset(s->frame->data[0] + j * s->frame->linesize[0],
+ v, avctx->width);
}
} else {
- av_log(avctx, AV_LOG_WARNING, "unsupported frame type %i\n", video_type);
+ av_log(avctx, AV_LOG_WARNING,
+ "unsupported frame type %i\n", video_type);
return AVERROR_INVALIDDATA;
}
}
}
if (video_size) {
- s->frame.key_frame = 1;
- s->frame.pict_type = AV_PICTURE_TYPE_I;
- s->frame.palette_has_changed = s->palette_has_changed;
- s->palette_has_changed = 0;
- memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
+ s->frame->key_frame = 1;
+ s->frame->pict_type = AV_PICTURE_TYPE_I;
+ s->frame->palette_has_changed = s->palette_has_changed;
+ s->palette_has_changed = 0;
+ memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE);
- if ((ret = av_frame_ref(data, &s->frame)) < 0)
+ if ((ret = av_frame_ref(data, s->frame)) < 0)
return ret;
*got_frame = 1;
}
{
JvContext *s = avctx->priv_data;
- av_frame_unref(&s->frame);
+ av_frame_free(&s->frame);
return 0;
}
.init = decode_init,
.close = decode_close,
.decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
+ .capabilities = AV_CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff