#include <stdlib.h>
#include <string.h>
-#include "libavutil/audioconvert.h"
+#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
+#include "internal.h"
+#include "bytestream.h"
#define VMD_HEADER_SIZE 0x330
#define PALETTE_COUNT 256
typedef struct VmdVideoContext {
AVCodecContext *avctx;
- AVFrame frame;
AVFrame prev_frame;
const unsigned char *buf;
static void lz_unpack(const unsigned char *src, int src_len,
unsigned char *dest, int dest_len)
{
- const unsigned char *s;
- unsigned int s_len;
unsigned char *d;
unsigned char *d_end;
unsigned char queue[QUEUE_SIZE];
unsigned int speclen;
unsigned char tag;
unsigned int i, j;
+ GetByteContext gb;
- s = src;
- s_len = src_len;
+ bytestream2_init(&gb, src, src_len);
d = dest;
d_end = d + dest_len;
- dataleft = AV_RL32(s);
- s += 4; s_len -= 4;
+ dataleft = bytestream2_get_le32(&gb);
memset(queue, 0x20, QUEUE_SIZE);
- if (s_len < 4)
+ if (bytestream2_get_bytes_left(&gb) < 4)
return;
- if (AV_RL32(s) == 0x56781234) {
- s += 4; s_len -= 4;
+ if (bytestream2_peek_le32(&gb) == 0x56781234) {
+ bytestream2_get_le32(&gb);
qpos = 0x111;
speclen = 0xF + 3;
} else {
speclen = 100; /* no speclen */
}
- while (dataleft > 0 && s_len > 0) {
- tag = *s++; s_len--;
+ while (dataleft > 0 && bytestream2_get_bytes_left(&gb) > 0) {
+ tag = bytestream2_get_byteu(&gb);
if ((tag == 0xFF) && (dataleft > 8)) {
- if (d + 8 > d_end || s_len < 8)
+ if (d + 8 > d_end || bytestream2_get_bytes_left(&gb) < 8)
return;
for (i = 0; i < 8; i++) {
- queue[qpos++] = *d++ = *s++;
+ queue[qpos++] = *d++ = bytestream2_get_byteu(&gb);
qpos &= QUEUE_MASK;
}
- s_len -= 8;
dataleft -= 8;
} else {
for (i = 0; i < 8; i++) {
if (dataleft == 0)
break;
if (tag & 0x01) {
- if (d + 1 > d_end || s_len < 1)
+ if (d + 1 > d_end || bytestream2_get_bytes_left(&gb) < 1)
return;
- queue[qpos++] = *d++ = *s++;
+ queue[qpos++] = *d++ = bytestream2_get_byte(&gb);
qpos &= QUEUE_MASK;
dataleft--;
- s_len--;
} else {
- if (s_len < 2)
- return;
- chainofs = *s++;
- chainofs |= ((*s & 0xF0) << 4);
- chainlen = (*s++ & 0x0F) + 3;
- s_len -= 2;
+ chainofs = bytestream2_get_byte(&gb);
+ chainofs |= ((bytestream2_peek_byte(&gb) & 0xF0) << 4);
+ chainlen = (bytestream2_get_byte(&gb) & 0x0F) + 3;
if (chainlen == speclen) {
- if (s_len < 1)
- return;
- chainlen = *s++ + 0xF + 3;
- s_len--;
+ chainlen = bytestream2_get_byte(&gb) + 0xF + 3;
}
if (d + chainlen > d_end)
return;
static int rle_unpack(const unsigned char *src, unsigned char *dest,
int src_count, int src_size, int dest_len)
{
- const unsigned char *ps;
unsigned char *pd;
int i, l;
unsigned char *dest_end = dest + dest_len;
+ GetByteContext gb;
- ps = src;
+ bytestream2_init(&gb, src, src_size);
pd = dest;
if (src_count & 1) {
- if (src_size < 1)
+ if (bytestream2_get_bytes_left(&gb) < 1)
return 0;
- *pd++ = *ps++;
- src_size--;
+ *pd++ = bytestream2_get_byteu(&gb);
}
src_count >>= 1;
i = 0;
do {
- if (src_size < 1)
+ if (bytestream2_get_bytes_left(&gb) < 1)
break;
- l = *ps++;
- src_size--;
+ l = bytestream2_get_byteu(&gb);
if (l & 0x80) {
l = (l & 0x7F) * 2;
- if (pd + l > dest_end || src_size < l)
- return ps - src;
- memcpy(pd, ps, l);
- ps += l;
- src_size -= l;
+ if (pd + l > dest_end || bytestream2_get_bytes_left(&gb) < l)
+ return bytestream2_tell(&gb);
+ bytestream2_get_buffer(&gb, pd, l);
pd += l;
} else {
- if (pd + i > dest_end || src_size < 2)
- return ps - src;
+ if (pd + i > dest_end || bytestream2_get_bytes_left(&gb) < 2)
+ return bytestream2_tell(&gb);
for (i = 0; i < l; i++) {
- *pd++ = ps[0];
- *pd++ = ps[1];
+ *pd++ = bytestream2_get_byteu(&gb);
+ *pd++ = bytestream2_get_byteu(&gb);
}
- ps += 2;
- src_size -= 2;
+ bytestream2_skip(&gb, 2);
}
i += l;
} while (i < src_count);
- return ps - src;
+ return bytestream2_tell(&gb);
}
-static void vmd_decode(VmdVideoContext *s)
+static void vmd_decode(VmdVideoContext *s, AVFrame *frame)
{
int i;
unsigned int *palette32;
unsigned char r, g, b;
- /* point to the start of the encoded data */
- const unsigned char *p = s->buf + 16;
+ GetByteContext gb;
- const unsigned char *pb;
- unsigned int pb_size;
unsigned char meth;
unsigned char *dp; /* pointer to current frame */
unsigned char *pp; /* pointer to previous frame */
(frame_x || frame_y || (frame_width != s->avctx->width) ||
(frame_height != s->avctx->height))) {
- memcpy(s->frame.data[0], s->prev_frame.data[0],
- s->avctx->height * s->frame.linesize[0]);
+ memcpy(frame->data[0], s->prev_frame.data[0],
+ s->avctx->height * frame->linesize[0]);
}
/* check if there is a new palette */
+ bytestream2_init(&gb, s->buf + 16, s->size - 16);
if (s->buf[15] & 0x02) {
- p += 2;
+ bytestream2_skip(&gb, 2);
palette32 = (unsigned int *)s->palette;
- for (i = 0; i < PALETTE_COUNT; i++) {
- r = *p++ * 4;
- g = *p++ * 4;
- b = *p++ * 4;
- palette32[i] = (r << 16) | (g << 8) | (b);
+ if (bytestream2_get_bytes_left(&gb) >= PALETTE_COUNT * 3) {
+ for (i = 0; i < PALETTE_COUNT; i++) {
+ r = bytestream2_get_byteu(&gb) * 4;
+ g = bytestream2_get_byteu(&gb) * 4;
+ b = bytestream2_get_byteu(&gb) * 4;
+ palette32[i] = (r << 16) | (g << 8) | (b);
+ }
}
s->size -= (256 * 3 + 2);
}
if (s->size > 0) {
/* originally UnpackFrame in VAG's code */
- pb = p;
- pb_size = s->buf + s->size - pb;
- if (pb_size < 1)
+ bytestream2_init(&gb, gb.buffer, s->buf + s->size - gb.buffer);
+ if (bytestream2_get_bytes_left(&gb) < 1)
return;
- meth = *pb++; pb_size--;
+ meth = bytestream2_get_byteu(&gb);
if (meth & 0x80) {
- lz_unpack(pb, pb_size,
+ lz_unpack(gb.buffer, bytestream2_get_bytes_left(&gb),
s->unpack_buffer, s->unpack_buffer_size);
meth &= 0x7F;
- pb = s->unpack_buffer;
- pb_size = s->unpack_buffer_size;
+ bytestream2_init(&gb, s->unpack_buffer, s->unpack_buffer_size);
}
- dp = &s->frame.data[0][frame_y * s->frame.linesize[0] + frame_x];
+ dp = &frame->data[0][frame_y * frame->linesize[0] + frame_x];
pp = &s->prev_frame.data[0][frame_y * s->prev_frame.linesize[0] + frame_x];
switch (meth) {
case 1:
for (i = 0; i < frame_height; i++) {
ofs = 0;
do {
- if (pb_size < 1)
- return;
- len = *pb++;
- pb_size--;
+ len = bytestream2_get_byte(&gb);
if (len & 0x80) {
len = (len & 0x7F) + 1;
- if (ofs + len > frame_width || pb_size < len)
+ if (ofs + len > frame_width || bytestream2_get_bytes_left(&gb) < len)
return;
- memcpy(&dp[ofs], pb, len);
- pb += len;
- pb_size -= len;
+ bytestream2_get_buffer(&gb, &dp[ofs], len);
ofs += len;
} else {
/* interframe pixel copy */
ofs, frame_width);
break;
}
- dp += s->frame.linesize[0];
+ dp += frame->linesize[0];
pp += s->prev_frame.linesize[0];
}
break;
case 2:
for (i = 0; i < frame_height; i++) {
- if (pb_size < frame_width)
- return;
- memcpy(dp, pb, frame_width);
- pb += frame_width;
- pb_size -= frame_width;
- dp += s->frame.linesize[0];
+ bytestream2_get_buffer(&gb, dp, frame_width);
+ dp += frame->linesize[0];
pp += s->prev_frame.linesize[0];
}
break;
for (i = 0; i < frame_height; i++) {
ofs = 0;
do {
- if (pb_size < 1)
- return;
- len = *pb++;
- pb_size--;
+ len = bytestream2_get_byte(&gb);
if (len & 0x80) {
len = (len & 0x7F) + 1;
- if (pb_size < 1)
- return;
- if (*pb++ == 0xFF)
- len = rle_unpack(pb, &dp[ofs], len, pb_size, frame_width - ofs);
- else {
- if (pb_size < len)
- return;
- memcpy(&dp[ofs], pb, len);
- }
- pb += len;
- pb_size -= 1 + len;
- ofs += len;
+ if (bytestream2_get_byte(&gb) == 0xFF)
+ len = rle_unpack(gb.buffer, &dp[ofs],
+ len, bytestream2_get_bytes_left(&gb),
+ frame_width - ofs);
+ else
+ bytestream2_get_buffer(&gb, &dp[ofs], len);
+ bytestream2_skip(&gb, len);
} else {
/* interframe pixel copy */
if (ofs + len + 1 > frame_width || !s->prev_frame.data[0])
av_log(s->avctx, AV_LOG_ERROR, "VMD video: offset > width (%d > %d)\n",
ofs, frame_width);
}
- dp += s->frame.linesize[0];
+ dp += frame->linesize[0];
pp += s->prev_frame.linesize[0];
}
break;
}
static int vmdvideo_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
+ void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
VmdVideoContext *s = avctx->priv_data;
+ AVFrame *frame = data;
+ int ret;
s->buf = buf;
s->size = buf_size;
if (buf_size < 16)
return buf_size;
- s->frame.reference = 1;
- if (avctx->get_buffer(avctx, &s->frame)) {
+ if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "VMD Video: get_buffer() failed\n");
- return -1;
+ return ret;
}
- vmd_decode(s);
+ vmd_decode(s, frame);
/* make the palette available on the way out */
- memcpy(s->frame.data[1], s->palette, PALETTE_COUNT * 4);
+ memcpy(frame->data[1], s->palette, PALETTE_COUNT * 4);
/* shuffle frames */
- FFSWAP(AVFrame, s->frame, s->prev_frame);
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
+ av_frame_unref(&s->prev_frame);
+ if ((ret = av_frame_ref(&s->prev_frame, frame)) < 0)
+ return ret;
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->prev_frame;
+ *got_frame = 1;
/* report that the buffer was completely consumed */
return buf_size;
{
VmdVideoContext *s = avctx->priv_data;
- if (s->prev_frame.data[0])
- avctx->release_buffer(avctx, &s->prev_frame);
+ av_frame_unref(&s->prev_frame);
av_free(s->unpack_buffer);
return 0;
#define BLOCK_TYPE_SILENCE 3
typedef struct VmdAudioContext {
- AVFrame frame;
int out_bps;
int chunk_size;
} VmdAudioContext;
s->chunk_size = avctx->block_align + avctx->channels * (s->out_bps == 2);
- avcodec_get_frame_defaults(&s->frame);
- avctx->coded_frame = &s->frame;
-
av_log(avctx, AV_LOG_DEBUG, "%d channels, %d bits/sample, "
"block align = %d, sample rate = %d\n",
avctx->channels, avctx->bits_per_coded_sample, avctx->block_align,
static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
+ AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
const uint8_t *buf_end;
int buf_size = avpkt->size;
audio_chunks = buf_size / s->chunk_size;
/* get output buffer */
- s->frame.nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) / avctx->channels;
- if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+ frame->nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) /
+ avctx->channels;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
- output_samples_u8 = s->frame.data[0];
- output_samples_s16 = (int16_t *)s->frame.data[0];
+ output_samples_u8 = frame->data[0];
+ output_samples_s16 = (int16_t *)frame->data[0];
/* decode silent chunks */
if (silent_chunks > 0) {
/* decode audio chunks */
if (audio_chunks > 0) {
buf_end = buf + buf_size;
- while (buf < buf_end) {
+ while (buf + s->chunk_size <= buf_end) {
if (s->out_bps == 2) {
decode_audio_s16(output_samples_s16, buf, s->chunk_size,
avctx->channels);
}
}
- *got_frame_ptr = 1;
- *(AVFrame *)data = s->frame;
+ *got_frame_ptr = 1;
return avpkt->size;
}
projects / ffmpeg / blobdiff