* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
#include <string.h>
#include <unistd.h>
-#include "common.h"
#include "avcodec.h"
-#include "dsputil.h"
#define VMD_HEADER_SIZE 0x330
#define PALETTE_COUNT 256
typedef struct VmdVideoContext {
AVCodecContext *avctx;
- DSPContext dsp;
AVFrame frame;
AVFrame prev_frame;
- unsigned char *buf;
+ const unsigned char *buf;
int size;
unsigned char palette[PALETTE_COUNT * 4];
unsigned char *unpack_buffer;
int unpack_buffer_size;
+ int x_off, y_off;
} VmdVideoContext;
#define QUEUE_SIZE 0x1000
#define QUEUE_MASK 0x0FFF
-static void lz_unpack(unsigned char *src, unsigned char *dest, int dest_len)
+static void lz_unpack(const unsigned char *src, unsigned char *dest, int dest_len)
{
- unsigned char *s;
+ const unsigned char *s;
unsigned char *d;
unsigned char *d_end;
unsigned char queue[QUEUE_SIZE];
s = src;
d = dest;
d_end = d + dest_len;
- dataleft = LE_32(s);
+ dataleft = AV_RL32(s);
s += 4;
memset(queue, 0x20, QUEUE_SIZE);
- if (LE_32(s) == 0x56781234) {
+ if (AV_RL32(s) == 0x56781234) {
s += 4;
qpos = 0x111;
speclen = 0xF + 3;
}
}
-static int rle_unpack(unsigned char *src, unsigned char *dest,
+static int rle_unpack(const unsigned char *src, unsigned char *dest,
int src_len, int dest_len)
{
- unsigned char *ps;
+ const unsigned char *ps;
unsigned char *pd;
int i, l;
unsigned char *dest_end = dest + dest_len;
unsigned char r, g, b;
/* point to the start of the encoded data */
- unsigned char *p = s->buf + 16;
+ const unsigned char *p = s->buf + 16;
- unsigned char *pb;
+ const unsigned char *pb;
unsigned char meth;
unsigned char *dp; /* pointer to current frame */
unsigned char *pp; /* pointer to previous frame */
int frame_width, frame_height;
int dp_size;
- frame_x = LE_16(&s->buf[6]);
- frame_y = LE_16(&s->buf[8]);
- frame_width = LE_16(&s->buf[10]) - frame_x + 1;
- frame_height = LE_16(&s->buf[12]) - frame_y + 1;
+ frame_x = AV_RL16(&s->buf[6]);
+ frame_y = AV_RL16(&s->buf[8]);
+ frame_width = AV_RL16(&s->buf[10]) - frame_x + 1;
+ frame_height = AV_RL16(&s->buf[12]) - frame_y + 1;
+
+ if ((frame_width == s->avctx->width && frame_height == s->avctx->height) &&
+ (frame_x || frame_y)) {
+
+ s->x_off = frame_x;
+ s->y_off = frame_y;
+ }
+ frame_x -= s->x_off;
+ frame_y -= s->y_off;
/* if only a certain region will be updated, copy the entire previous
* frame before the decode */
}
}
-static int vmdvideo_decode_init(AVCodecContext *avctx)
+static av_cold int vmdvideo_decode_init(AVCodecContext *avctx)
{
- VmdVideoContext *s = (VmdVideoContext *)avctx->priv_data;
+ VmdVideoContext *s = avctx->priv_data;
int i;
unsigned int *palette32;
int palette_index = 0;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
- avctx->has_b_frames = 0;
- dsputil_init(&s->dsp, avctx);
/* make sure the VMD header made it */
if (s->avctx->extradata_size != VMD_HEADER_SIZE) {
}
vmd_header = (unsigned char *)avctx->extradata;
- s->unpack_buffer_size = LE_32(&vmd_header[800]);
+ s->unpack_buffer_size = AV_RL32(&vmd_header[800]);
s->unpack_buffer = av_malloc(s->unpack_buffer_size);
if (!s->unpack_buffer)
return -1;
static int vmdvideo_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
- VmdVideoContext *s = (VmdVideoContext *)avctx->priv_data;
+ VmdVideoContext *s = avctx->priv_data;
s->buf = buf;
s->size = buf_size;
/* make the palette available on the way out */
memcpy(s->frame.data[1], s->palette, PALETTE_COUNT * 4);
- if (s->prev_frame.data[0])
- avctx->release_buffer(avctx, &s->prev_frame);
-
/* shuffle frames */
- s->prev_frame = s->frame;
+ FFSWAP(AVFrame, s->frame, s->prev_frame);
+ if (s->frame.data[0])
+ avctx->release_buffer(avctx, &s->frame);
*data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->frame;
+ *(AVFrame*)data = s->prev_frame;
/* report that the buffer was completely consumed */
return buf_size;
}
-static int vmdvideo_decode_end(AVCodecContext *avctx)
+static av_cold int vmdvideo_decode_end(AVCodecContext *avctx)
{
- VmdVideoContext *s = (VmdVideoContext *)avctx->priv_data;
+ VmdVideoContext *s = avctx->priv_data;
if (s->prev_frame.data[0])
avctx->release_buffer(avctx, &s->prev_frame);
0xF00, 0x1000, 0x1400, 0x1800, 0x1C00, 0x2000, 0x3000, 0x4000
};
-static int vmdaudio_decode_init(AVCodecContext *avctx)
+static av_cold int vmdaudio_decode_init(AVCodecContext *avctx)
{
- VmdAudioContext *s = (VmdAudioContext *)avctx->priv_data;
+ VmdAudioContext *s = avctx->priv_data;
s->avctx = avctx;
s->channels = avctx->channels;
}
static void vmdaudio_decode_audio(VmdAudioContext *s, unsigned char *data,
- uint8_t *buf, int stereo)
+ const uint8_t *buf, int stereo)
{
int i;
int chan = 0;
s->predictors[chan] -= vmdaudio_table[buf[i] & 0x7F];
else
s->predictors[chan] += vmdaudio_table[buf[i]];
- s->predictors[chan] = clip(s->predictors[chan], -32768, 32767);
+ s->predictors[chan] = av_clip_int16(s->predictors[chan]);
out[i] = s->predictors[chan];
chan ^= stereo;
}
}
static int vmdaudio_loadsound(VmdAudioContext *s, unsigned char *data,
- uint8_t *buf, int silence)
+ const uint8_t *buf, int silence)
{
int bytes_decoded = 0;
int i;
static int vmdaudio_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ const uint8_t *buf, int buf_size)
{
- VmdAudioContext *s = (VmdAudioContext *)avctx->priv_data;
- unsigned int sound_flags;
+ VmdAudioContext *s = avctx->priv_data;
unsigned char *output_samples = (unsigned char *)data;
/* point to the start of the encoded data */
- unsigned char *p = buf + 16;
- unsigned char *p_end = buf + buf_size;
+ const unsigned char *p = buf + 16;
if (buf_size < 16)
return buf_size;
/* the chunk contains audio */
*data_size = vmdaudio_loadsound(s, output_samples, p, 0);
} else if (buf[6] == 2) {
- /* the chunk contains audio and silence mixed together */
- sound_flags = LE_32(p);
+ /* the chunk may contain audio */
p += 4;
-
- /* do something with extrabufs here? */
-
- while (p < p_end) {
- if (sound_flags & 0x01)
- /* silence */
- *data_size += vmdaudio_loadsound(s, output_samples, p, 1);
- else {
- /* audio */
- *data_size += vmdaudio_loadsound(s, output_samples, p, 0);
- p += s->block_align;
- }
- output_samples += (s->block_align * s->bits / 8);
- sound_flags >>= 1;
- }
+ *data_size = vmdaudio_loadsound(s, output_samples, p, (buf_size == 16));
+ output_samples += (s->block_align * s->bits / 8);
} else if (buf[6] == 3) {
/* silent chunk */
*data_size = vmdaudio_loadsound(s, output_samples, p, 1);
projects / ffmpeg / blobdiff