* 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
- *
*/
/**
- * @file vqavideo.c
+ * @file libavcodec/vqavideo.c
* VQA Video Decoder by Mike Melanson (melanson@pcisys.net)
* For more information about the VQA format, visit:
* http://wiki.multimedia.cx/index.php?title=VQA
* file. This is an interesting technique, although it makes random file
* seeking difficult despite the fact that the frames are all intracoded.
*
- * V1,2 VQA uses 12-bit codebook indices. If the 12-bit indices were
+ * V1,2 VQA uses 12-bit codebook indexes. If the 12-bit indexes were
* packed into bytes and then RLE compressed, bytewise, the results would
* be poor. That is why the coding method divides each index into 2 parts,
* the top 4 bits and the bottom 8 bits, then RL encodes the 4-bit pieces
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
-#include "common.h"
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-#include "dsputil.h"
#define PALETTE_COUNT 256
#define VQA_HEADER_SIZE 0x2A
typedef struct VqaContext {
AVCodecContext *avctx;
- DSPContext dsp;
AVFrame frame;
- unsigned char *buf;
+ const unsigned char *buf;
int size;
uint32_t palette[PALETTE_COUNT];
} VqaContext;
-static int vqa_decode_init(AVCodecContext *avctx)
+static av_cold int vqa_decode_init(AVCodecContext *avctx)
{
- VqaContext *s = (VqaContext *)avctx->priv_data;
+ VqaContext *s = avctx->priv_data;
unsigned char *vqa_header;
- int i, j, codebook_index;;
+ int i, j, codebook_index;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
- avctx->has_b_frames = 0;
- dsputil_init(&s->dsp, avctx);
/* make sure the extradata made it */
if (s->avctx->extradata_size != VQA_HEADER_SIZE) {
/* load up the VQA parameters from the header */
vqa_header = (unsigned char *)s->avctx->extradata;
s->vqa_version = vqa_header[0];
- s->width = LE_16(&vqa_header[6]);
- s->height = LE_16(&vqa_header[8]);
+ s->width = AV_RL16(&vqa_header[6]);
+ s->height = AV_RL16(&vqa_header[8]);
if(avcodec_check_dimensions(avctx, s->width, s->height)){
s->width= s->height= 0;
return -1;
return; \
}
-static void decode_format80(unsigned char *src, int src_size,
+static void decode_format80(const unsigned char *src, int src_size,
unsigned char *dest, int dest_size, int check_size) {
int src_index = 0;
if (src[src_index] == 0xFF) {
src_index++;
- count = LE_16(&src[src_index]);
+ count = AV_RL16(&src[src_index]);
src_index += 2;
- src_pos = LE_16(&src[src_index]);
+ src_pos = AV_RL16(&src[src_index]);
src_index += 2;
vqa_debug("(1) copy %X bytes from absolute pos %X\n", count, src_pos);
CHECK_COUNT();
} else if (src[src_index] == 0xFE) {
src_index++;
- count = LE_16(&src[src_index]);
+ count = AV_RL16(&src[src_index]);
src_index += 2;
color = src[src_index++];
vqa_debug("(2) set %X bytes to %02X\n", count, color);
} else if ((src[src_index] & 0xC0) == 0xC0) {
count = (src[src_index++] & 0x3F) + 3;
- src_pos = LE_16(&src[src_index]);
+ src_pos = AV_RL16(&src[src_index]);
src_index += 2;
vqa_debug("(3) copy %X bytes from absolute pos %X\n", count, src_pos);
CHECK_COUNT();
} else {
count = ((src[src_index] & 0x70) >> 4) + 3;
- src_pos = BE_16(&src[src_index]) & 0x0FFF;
+ src_pos = AV_RB16(&src[src_index]) & 0x0FFF;
src_index += 2;
vqa_debug("(5) copy %X bytes from relpos %X\n", count, src_pos);
CHECK_COUNT();
/* first, traverse through the frame and find the subchunks */
while (index < s->size) {
- chunk_type = BE_32(&s->buf[index]);
- chunk_size = BE_32(&s->buf[index + 4]);
+ chunk_type = AV_RB32(&s->buf[index]);
+ chunk_size = AV_RB32(&s->buf[index + 4]);
switch (chunk_type) {
/* convert the RGB palette into the machine's endian format */
if (cpl0_chunk != -1) {
- chunk_size = BE_32(&s->buf[cpl0_chunk + 4]);
+ chunk_size = AV_RB32(&s->buf[cpl0_chunk + 4]);
/* sanity check the palette size */
if (chunk_size / 3 > 256) {
av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: found a palette chunk with %d colors\n",
/* decompress the full codebook chunk */
if (cbfz_chunk != -1) {
- chunk_size = BE_32(&s->buf[cbfz_chunk + 4]);
+ chunk_size = AV_RB32(&s->buf[cbfz_chunk + 4]);
cbfz_chunk += CHUNK_PREAMBLE_SIZE;
decode_format80(&s->buf[cbfz_chunk], chunk_size,
s->codebook, s->codebook_size, 0);
/* copy a full codebook */
if (cbf0_chunk != -1) {
- chunk_size = BE_32(&s->buf[cbf0_chunk + 4]);
+ chunk_size = AV_RB32(&s->buf[cbf0_chunk + 4]);
/* sanity check the full codebook size */
if (chunk_size > MAX_CODEBOOK_SIZE) {
av_log(s->avctx, AV_LOG_ERROR, " VQA video: problem: CBF0 chunk too large (0x%X bytes)\n",
return;
}
- chunk_size = BE_32(&s->buf[vptz_chunk + 4]);
+ chunk_size = AV_RB32(&s->buf[vptz_chunk + 4]);
vptz_chunk += CHUNK_PREAMBLE_SIZE;
decode_format80(&s->buf[vptz_chunk], chunk_size,
s->decode_buffer, s->decode_buffer_size, 1);
if (cbp0_chunk != -1) {
- chunk_size = BE_32(&s->buf[cbp0_chunk + 4]);
+ chunk_size = AV_RB32(&s->buf[cbp0_chunk + 4]);
cbp0_chunk += CHUNK_PREAMBLE_SIZE;
/* accumulate partial codebook */
if (cbpz_chunk != -1) {
- chunk_size = BE_32(&s->buf[cbpz_chunk + 4]);
+ chunk_size = AV_RB32(&s->buf[cbpz_chunk + 4]);
cbpz_chunk += CHUNK_PREAMBLE_SIZE;
/* accumulate partial codebook */
static int vqa_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
- VqaContext *s = (VqaContext *)avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ VqaContext *s = avctx->priv_data;
s->buf = buf;
s->size = buf_size;
return buf_size;
}
-static int vqa_decode_end(AVCodecContext *avctx)
+static av_cold int vqa_decode_end(AVCodecContext *avctx)
{
- VqaContext *s = (VqaContext *)avctx->priv_data;
+ VqaContext *s = avctx->priv_data;
av_free(s->codebook);
av_free(s->next_codebook_buffer);
AVCodec vqa_decoder = {
"vqavideo",
- CODEC_TYPE_VIDEO,
+ AVMEDIA_TYPE_VIDEO,
CODEC_ID_WS_VQA,
sizeof(VqaContext),
vqa_decode_init,
vqa_decode_end,
vqa_decode_frame,
CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Westwood Studios VQA (Vector Quantized Animation) video"),
};
projects / ffmpeg / blobdiff