* Sierra VMD Audio & Video Decoders
* Copyright (C) 2004 the ffmpeg project
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <string.h>
+#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
if (bytestream2_get_bytes_left(&gb) < 4)
return;
if (bytestream2_peek_le32(&gb) == 0x56781234) {
- bytestream2_get_le32(&gb);
+ bytestream2_skipu(&gb, 4);
qpos = 0x111;
speclen = 0xF + 3;
} else {
while (dataleft > 0 && bytestream2_get_bytes_left(&gb) > 0) {
tag = bytestream2_get_byteu(&gb);
if ((tag == 0xFF) && (dataleft > 8)) {
- if (d + 8 > d_end || bytestream2_get_bytes_left(&gb) < 8)
+ if (d_end - d < 8 || bytestream2_get_bytes_left(&gb) < 8)
return;
for (i = 0; i < 8; i++) {
queue[qpos++] = *d++ = bytestream2_get_byteu(&gb);
if (dataleft == 0)
break;
if (tag & 0x01) {
- if (d + 1 > d_end || bytestream2_get_bytes_left(&gb) < 1)
+ if (d_end - d < 1 || bytestream2_get_bytes_left(&gb) < 1)
return;
- queue[qpos++] = *d++ = bytestream2_get_byte(&gb);
+ queue[qpos++] = *d++ = bytestream2_get_byteu(&gb);
qpos &= QUEUE_MASK;
dataleft--;
} else {
if (chainlen == speclen) {
chainlen = bytestream2_get_byte(&gb) + 0xF + 3;
}
- if (d + chainlen > d_end)
+ if (d_end - d < chainlen)
return;
for (j = 0; j < chainlen; j++) {
*d = queue[chainofs++ & QUEUE_MASK];
}
}
}
-
static int rle_unpack(const unsigned char *src, unsigned char *dest,
- int src_count, int src_size, int dest_len)
+ int src_count, int src_size, int dest_len)
{
unsigned char *pd;
- int i, l;
+ int i, l, used = 0;
unsigned char *dest_end = dest + dest_len;
GetByteContext gb;
+ uint16_t run_val;
bytestream2_init(&gb, src, src_size);
pd = dest;
if (bytestream2_get_bytes_left(&gb) < 1)
return 0;
*pd++ = bytestream2_get_byteu(&gb);
+ used++;
}
- src_count >>= 1;
- i = 0;
do {
if (bytestream2_get_bytes_left(&gb) < 1)
break;
l = bytestream2_get_byteu(&gb);
if (l & 0x80) {
l = (l & 0x7F) * 2;
- if (pd + l > dest_end || bytestream2_get_bytes_left(&gb) < l)
+ if (dest_end - pd < l || bytestream2_get_bytes_left(&gb) < l)
return bytestream2_tell(&gb);
- bytestream2_get_buffer(&gb, pd, l);
+ bytestream2_get_bufferu(&gb, pd, l);
pd += l;
} else {
- if (pd + i > dest_end || bytestream2_get_bytes_left(&gb) < 2)
+ if (dest_end - pd < 2*l || bytestream2_get_bytes_left(&gb) < 2)
return bytestream2_tell(&gb);
+ run_val = bytestream2_get_ne16(&gb);
for (i = 0; i < l; i++) {
- *pd++ = bytestream2_get_byteu(&gb);
- *pd++ = bytestream2_get_byteu(&gb);
+ AV_WN16(pd, run_val);
+ pd += 2;
}
- bytestream2_skip(&gb, 2);
+ l *= 2;
}
- i += l;
- } while (i < src_count);
+ used += l;
+ } while (used < src_count);
return bytestream2_tell(&gb);
}
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 (frame_x < 0 || frame_width < 0 ||
frame_x >= s->avctx->width ||
frame_width > s->avctx->width ||
return AVERROR_INVALIDDATA;
}
- 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 */
if (s->prev_frame.data[0] &&
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);
+ palette32[i] = 0xFFU << 24 | (r << 16) | (g << 8) | (b);
+ palette32[i] |= palette32[i] >> 6 & 0x30303;
}
} else {
av_log(s->avctx, AV_LOG_ERROR, "Incomplete palette\n");
return AVERROR_INVALIDDATA;
}
- s->size -= PALETTE_COUNT * 3 + 2;
}
- if (s->size > 0) {
- /* originally UnpackFrame in VAG's code */
- bytestream2_init(&gb, gb.buffer, s->buf + s->size - gb.buffer);
- if (bytestream2_get_bytes_left(&gb) < 1)
+
+ if (!s->size)
+ return 0;
+
+ /* originally UnpackFrame in VAG's code */
+ if (bytestream2_get_bytes_left(&gb) < 1)
+ return AVERROR_INVALIDDATA;
+ meth = bytestream2_get_byteu(&gb);
+ if (meth & 0x80) {
+ if (!s->unpack_buffer_size) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Trying to unpack LZ-compressed frame with no LZ buffer\n");
return AVERROR_INVALIDDATA;
- meth = bytestream2_get_byteu(&gb);
- if (meth & 0x80) {
- lz_unpack(gb.buffer, bytestream2_get_bytes_left(&gb),
- s->unpack_buffer, s->unpack_buffer_size);
- meth &= 0x7F;
- bytestream2_init(&gb, s->unpack_buffer, s->unpack_buffer_size);
}
+ lz_unpack(gb.buffer, bytestream2_get_bytes_left(&gb),
+ s->unpack_buffer, s->unpack_buffer_size);
+ meth &= 0x7F;
+ bytestream2_init(&gb, s->unpack_buffer, s->unpack_buffer_size);
+ }
- 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 {
- len = bytestream2_get_byte(&gb);
- if (len & 0x80) {
- len = (len & 0x7F) + 1;
- if (ofs + len > frame_width || bytestream2_get_bytes_left(&gb) < len)
- return AVERROR_INVALIDDATA;
- bytestream2_get_buffer(&gb, &dp[ofs], len);
- ofs += len;
- } else {
- /* interframe pixel copy */
- if (ofs + len + 1 > frame_width || !s->prev_frame.data[0])
- return AVERROR_INVALIDDATA;
- memcpy(&dp[ofs], &pp[ofs], len + 1);
- ofs += len + 1;
- }
- } while (ofs < frame_width);
- if (ofs > frame_width) {
- av_log(s->avctx, AV_LOG_ERROR, "VMD video: offset > width (%d > %d)\n",
- ofs, frame_width);
- return AVERROR_INVALIDDATA;
+ 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 {
+ len = bytestream2_get_byte(&gb);
+ if (len & 0x80) {
+ len = (len & 0x7F) + 1;
+ if (ofs + len > frame_width ||
+ bytestream2_get_bytes_left(&gb) < len)
+ return AVERROR_INVALIDDATA;
+ bytestream2_get_bufferu(&gb, &dp[ofs], len);
+ ofs += len;
+ } else {
+ /* interframe pixel copy */
+ if (ofs + len + 1 > frame_width || !s->prev_frame.data[0])
+ return AVERROR_INVALIDDATA;
+ memcpy(&dp[ofs], &pp[ofs], len + 1);
+ ofs += len + 1;
}
- dp += frame->linesize[0];
- pp += s->prev_frame.linesize[0];
+ } while (ofs < frame_width);
+ if (ofs > frame_width) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "offset > width (%d > %d)\n",
+ ofs, frame_width);
+ return AVERROR_INVALIDDATA;
}
- break;
-
- case 2:
- for (i = 0; i < frame_height; i++) {
- bytestream2_get_buffer(&gb, dp, frame_width);
- dp += frame->linesize[0];
- pp += s->prev_frame.linesize[0];
- }
- break;
+ dp += frame->linesize[0];
+ pp += s->prev_frame.linesize[0];
+ }
+ break;
- case 3:
- for (i = 0; i < frame_height; i++) {
- ofs = 0;
- do {
- len = bytestream2_get_byte(&gb);
- if (len & 0x80) {
- len = (len & 0x7F) + 1;
- 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);
+ case 2:
+ for (i = 0; i < frame_height; i++) {
+ bytestream2_get_buffer(&gb, dp, frame_width);
+ dp += frame->linesize[0];
+ pp += s->prev_frame.linesize[0];
+ }
+ break;
+
+ case 3:
+ for (i = 0; i < frame_height; i++) {
+ ofs = 0;
+ do {
+ len = bytestream2_get_byte(&gb);
+ if (len & 0x80) {
+ len = (len & 0x7F) + 1;
+ if (bytestream2_peek_byte(&gb) == 0xFF) {
+ int slen = len;
+ bytestream2_get_byte(&gb);
+ len = rle_unpack(gb.buffer, &dp[ofs],
+ len, bytestream2_get_bytes_left(&gb),
+ frame_width - ofs);
+ ofs += slen;
bytestream2_skip(&gb, len);
} else {
- /* interframe pixel copy */
- if (ofs + len + 1 > frame_width || !s->prev_frame.data[0])
- return AVERROR_INVALIDDATA;
- memcpy(&dp[ofs], &pp[ofs], len + 1);
- ofs += len + 1;
+ bytestream2_get_buffer(&gb, &dp[ofs], len);
+ ofs += len;
}
- } while (ofs < frame_width);
- if (ofs > frame_width) {
- av_log(s->avctx, AV_LOG_ERROR, "VMD video: offset > width (%d > %d)\n",
- ofs, frame_width);
- return AVERROR_INVALIDDATA;
+ } else {
+ /* interframe pixel copy */
+ if (ofs + len + 1 > frame_width || !s->prev_frame.data[0])
+ return AVERROR_INVALIDDATA;
+ memcpy(&dp[ofs], &pp[ofs], len + 1);
+ ofs += len + 1;
}
- dp += frame->linesize[0];
- pp += s->prev_frame.linesize[0];
+ } while (ofs < frame_width);
+ if (ofs > frame_width) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "offset > width (%d > %d)\n",
+ ofs, frame_width);
+ return AVERROR_INVALIDDATA;
}
- break;
+ dp += frame->linesize[0];
+ pp += s->prev_frame.linesize[0];
}
+ break;
}
return 0;
}
/* make sure the VMD header made it */
if (s->avctx->extradata_size != VMD_HEADER_SIZE) {
- av_log(s->avctx, AV_LOG_ERROR, "VMD video: expected extradata size of %d\n",
+ av_log(s->avctx, AV_LOG_ERROR, "expected extradata size of %d\n",
VMD_HEADER_SIZE);
- return -1;
+ return AVERROR_INVALIDDATA;
}
vmd_header = (unsigned char *)avctx->extradata;
s->unpack_buffer_size = AV_RL32(&vmd_header[800]);
- s->unpack_buffer = av_malloc(s->unpack_buffer_size);
- if (!s->unpack_buffer)
- return -1;
+ if (s->unpack_buffer_size) {
+ s->unpack_buffer = av_malloc(s->unpack_buffer_size);
+ if (!s->unpack_buffer)
+ return AVERROR(ENOMEM);
+ }
/* load up the initial palette */
raw_palette = &vmd_header[28];
palette32[i] = (r << 16) | (g << 8) | (b);
}
+ avcodec_get_frame_defaults(&s->prev_frame);
+
return 0;
}
if (buf_size < 16)
return AVERROR_INVALIDDATA;
- 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");
+ if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
return ret;
- }
if ((ret = vmd_decode(s, frame)) < 0)
return ret;
av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
return AVERROR(EINVAL);
}
- if (avctx->block_align < 1) {
+ if (avctx->block_align < 1 || avctx->block_align % avctx->channels) {
av_log(avctx, AV_LOG_ERROR, "invalid block align\n");
return AVERROR(EINVAL);
}
/* ensure output buffer is large enough */
audio_chunks = buf_size / s->chunk_size;
+ /* drop incomplete chunks */
+ buf_size = audio_chunks * s->chunk_size;
+
/* get output buffer */
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");
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
- }
output_samples_u8 = frame->data[0];
output_samples_s16 = (int16_t *)frame->data[0];
/* decode silent chunks */
if (silent_chunks > 0) {
int silent_size = avctx->block_align * silent_chunks;
+ av_assert0(avctx->block_align * silent_chunks <= frame->nb_samples * avctx->channels);
+
if (s->out_bps == 2) {
memset(output_samples_s16, 0x00, silent_size * 2);
output_samples_s16 += silent_size;
/* decode audio chunks */
if (audio_chunks > 0) {
buf_end = buf + buf_size;
- while (buf + s->chunk_size <= buf_end) {
+ av_assert0((buf_size & (avctx->channels > 1)) == 0);
+ while (buf_end - buf >= s->chunk_size) {
if (s->out_bps == 2) {
decode_audio_s16(output_samples_s16, buf, s->chunk_size,
avctx->channels);
projects / ffmpeg / blobdiff