* Quicktime Animation (RLE) Video Decoder
* Copyright (C) 2004 the ffmpeg project
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file qtrle.c
+ * @file
* QT RLE Video Decoder by Mike Melanson (melanson@pcisys.net)
* For more information about the QT RLE format, visit:
* http://www.pcisys.net/~melanson/codecs/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
#include "avcodec.h"
+#include "bytestream.h"
typedef struct QtrleContext {
-
AVCodecContext *avctx;
AVFrame frame;
- const unsigned char *buf;
- int size;
-
+ GetByteContext g;
+ uint32_t pal[256];
} QtrleContext;
-#define CHECK_STREAM_PTR(n) \
- if ((stream_ptr + n) > s->size) { \
- av_log (s->avctx, AV_LOG_INFO, "Problem: stream_ptr out of bounds (%d >= %d)\n", \
- stream_ptr + n, s->size); \
- return; \
- }
-
#define CHECK_PIXEL_PTR(n) \
if ((pixel_ptr + n > pixel_limit) || (pixel_ptr + n < 0)) { \
av_log (s->avctx, AV_LOG_INFO, "Problem: pixel_ptr = %d, pixel_limit = %d\n", \
return; \
} \
-static void qtrle_decode_1bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
+static void qtrle_decode_1bpp(QtrleContext *s, int row_ptr, int lines_to_change)
{
int rle_code;
int pixel_ptr = 0;
int skip;
while (lines_to_change) {
- CHECK_STREAM_PTR(2);
- skip = s->buf[stream_ptr++];
- rle_code = (signed char)s->buf[stream_ptr++];
+ skip = bytestream2_get_byte(&s->g);
+ rle_code = (signed char)bytestream2_get_byte(&s->g);
if (rle_code == 0)
break;
if(skip & 0x80) {
rle_code = -rle_code;
/* get the next 2 bytes from the stream, treat them as groups
* of 8 pixels, and output them rle_code times */
- CHECK_STREAM_PTR(2);
- pi0 = s->buf[stream_ptr++];
- pi1 = s->buf[stream_ptr++];
+
+ pi0 = bytestream2_get_byte(&s->g);
+ pi1 = bytestream2_get_byte(&s->g);
CHECK_PIXEL_PTR(rle_code * 2);
while (rle_code--) {
} else {
/* copy the same pixel directly to output 2 times */
rle_code *= 2;
- CHECK_STREAM_PTR(rle_code);
CHECK_PIXEL_PTR(rle_code);
while (rle_code--)
- rgb[pixel_ptr++] = s->buf[stream_ptr++];
+ rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
}
}
}
-static inline void qtrle_decode_2n4bpp(QtrleContext *s, int stream_ptr,
- int row_ptr, int lines_to_change, int bpp)
+static inline void qtrle_decode_2n4bpp(QtrleContext *s, int row_ptr,
+ int lines_to_change, int bpp)
{
int rle_code, i;
int pixel_ptr;
int num_pixels = (bpp == 4) ? 8 : 16;
while (lines_to_change--) {
- CHECK_STREAM_PTR(2);
- pixel_ptr = row_ptr + (num_pixels * (s->buf[stream_ptr++] - 1));
+ pixel_ptr = row_ptr + (num_pixels * (bytestream2_get_byte(&s->g) - 1));
- while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) {
+ while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
if (rle_code == 0) {
/* there's another skip code in the stream */
- CHECK_STREAM_PTR(1);
- pixel_ptr += (num_pixels * (s->buf[stream_ptr++] - 1));
+ pixel_ptr += (num_pixels * (bytestream2_get_byte(&s->g) - 1));
CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
} else if (rle_code < 0) {
/* decode the run length code */
rle_code = -rle_code;
/* get the next 4 bytes from the stream, treat them as palette
* indexes, and output them rle_code times */
- CHECK_STREAM_PTR(4);
for (i = num_pixels-1; i >= 0; i--) {
- pi[num_pixels-1-i] = (s->buf[stream_ptr] >> ((i*bpp) & 0x07)) & ((1<<bpp)-1);
- stream_ptr+= ((i & ((num_pixels>>2)-1)) == 0);
+ pi[num_pixels-1-i] = (bytestream2_peek_byte(&s->g) >> ((i*bpp) & 0x07)) & ((1<<bpp)-1);
+ bytestream2_skip(&s->g, ((i & ((num_pixels>>2)-1)) == 0));
}
CHECK_PIXEL_PTR(rle_code * num_pixels);
while (rle_code--) {
} else {
/* copy the same pixel directly to output 4 times */
rle_code *= 4;
- CHECK_STREAM_PTR(rle_code);
CHECK_PIXEL_PTR(rle_code*(num_pixels>>2));
while (rle_code--) {
if(bpp == 4) {
- rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 4) & 0x0f;
- rgb[pixel_ptr++] = (s->buf[stream_ptr++]) & 0x0f;
+ int x = bytestream2_get_byte(&s->g);
+ rgb[pixel_ptr++] = (x >> 4) & 0x0f;
+ rgb[pixel_ptr++] = x & 0x0f;
} else {
- rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 6) & 0x03;
- rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 4) & 0x03;
- rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 2) & 0x03;
- rgb[pixel_ptr++] = (s->buf[stream_ptr++]) & 0x03;
+ int x = bytestream2_get_byte(&s->g);
+ rgb[pixel_ptr++] = (x >> 6) & 0x03;
+ rgb[pixel_ptr++] = (x >> 4) & 0x03;
+ rgb[pixel_ptr++] = (x >> 2) & 0x03;
+ rgb[pixel_ptr++] = x & 0x03;
}
}
}
}
}
-static void qtrle_decode_8bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
+static void qtrle_decode_8bpp(QtrleContext *s, int row_ptr, int lines_to_change)
{
int rle_code;
int pixel_ptr;
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
while (lines_to_change--) {
- CHECK_STREAM_PTR(2);
- pixel_ptr = row_ptr + (4 * (s->buf[stream_ptr++] - 1));
+ pixel_ptr = row_ptr + (4 * (bytestream2_get_byte(&s->g) - 1));
- while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) {
+ while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
if (rle_code == 0) {
/* there's another skip code in the stream */
- CHECK_STREAM_PTR(1);
- pixel_ptr += (4 * (s->buf[stream_ptr++] - 1));
+ pixel_ptr += (4 * (bytestream2_get_byte(&s->g) - 1));
CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
} else if (rle_code < 0) {
/* decode the run length code */
rle_code = -rle_code;
/* get the next 4 bytes from the stream, treat them as palette
* indexes, and output them rle_code times */
- CHECK_STREAM_PTR(4);
- pi1 = s->buf[stream_ptr++];
- pi2 = s->buf[stream_ptr++];
- pi3 = s->buf[stream_ptr++];
- pi4 = s->buf[stream_ptr++];
+ pi1 = bytestream2_get_byte(&s->g);
+ pi2 = bytestream2_get_byte(&s->g);
+ pi3 = bytestream2_get_byte(&s->g);
+ pi4 = bytestream2_get_byte(&s->g);
CHECK_PIXEL_PTR(rle_code * 4);
} else {
/* copy the same pixel directly to output 4 times */
rle_code *= 4;
- CHECK_STREAM_PTR(rle_code);
CHECK_PIXEL_PTR(rle_code);
while (rle_code--) {
- rgb[pixel_ptr++] = s->buf[stream_ptr++];
+ rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
}
}
}
}
}
-static void qtrle_decode_16bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
+static void qtrle_decode_16bpp(QtrleContext *s, int row_ptr, int lines_to_change)
{
int rle_code;
int pixel_ptr;
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
while (lines_to_change--) {
- CHECK_STREAM_PTR(2);
- pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 2;
+ pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 2;
- while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) {
+ while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
if (rle_code == 0) {
/* there's another skip code in the stream */
- CHECK_STREAM_PTR(1);
- pixel_ptr += (s->buf[stream_ptr++] - 1) * 2;
+ pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 2;
CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
} else if (rle_code < 0) {
/* decode the run length code */
rle_code = -rle_code;
- CHECK_STREAM_PTR(2);
- rgb16 = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 2;
+ rgb16 = bytestream2_get_be16(&s->g);
CHECK_PIXEL_PTR(rle_code * 2);
pixel_ptr += 2;
}
} else {
- CHECK_STREAM_PTR(rle_code * 2);
CHECK_PIXEL_PTR(rle_code * 2);
/* copy pixels directly to output */
while (rle_code--) {
- rgb16 = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 2;
+ rgb16 = bytestream2_get_be16(&s->g);
*(unsigned short *)(&rgb[pixel_ptr]) = rgb16;
pixel_ptr += 2;
}
}
}
-static void qtrle_decode_24bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
+static void qtrle_decode_24bpp(QtrleContext *s, int row_ptr, int lines_to_change)
{
int rle_code;
int pixel_ptr;
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
while (lines_to_change--) {
- CHECK_STREAM_PTR(2);
- pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 3;
+ pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 3;
- while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) {
+ while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
if (rle_code == 0) {
/* there's another skip code in the stream */
- CHECK_STREAM_PTR(1);
- pixel_ptr += (s->buf[stream_ptr++] - 1) * 3;
+ pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 3;
CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
} else if (rle_code < 0) {
/* decode the run length code */
rle_code = -rle_code;
- CHECK_STREAM_PTR(3);
- r = s->buf[stream_ptr++];
- g = s->buf[stream_ptr++];
- b = s->buf[stream_ptr++];
+ r = bytestream2_get_byte(&s->g);
+ g = bytestream2_get_byte(&s->g);
+ b = bytestream2_get_byte(&s->g);
CHECK_PIXEL_PTR(rle_code * 3);
rgb[pixel_ptr++] = b;
}
} else {
- CHECK_STREAM_PTR(rle_code * 3);
CHECK_PIXEL_PTR(rle_code * 3);
/* copy pixels directly to output */
while (rle_code--) {
- rgb[pixel_ptr++] = s->buf[stream_ptr++];
- rgb[pixel_ptr++] = s->buf[stream_ptr++];
- rgb[pixel_ptr++] = s->buf[stream_ptr++];
+ rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
+ rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
+ rgb[pixel_ptr++] = bytestream2_get_byte(&s->g);
}
}
}
}
}
-static void qtrle_decode_32bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
+static void qtrle_decode_32bpp(QtrleContext *s, int row_ptr, int lines_to_change)
{
int rle_code;
int pixel_ptr;
int row_inc = s->frame.linesize[0];
- unsigned char a, r, g, b;
unsigned int argb;
unsigned char *rgb = s->frame.data[0];
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
while (lines_to_change--) {
- CHECK_STREAM_PTR(2);
- pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 4;
+ pixel_ptr = row_ptr + (bytestream2_get_byte(&s->g) - 1) * 4;
- while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) {
+ while ((rle_code = (signed char)bytestream2_get_byte(&s->g)) != -1) {
if (rle_code == 0) {
/* there's another skip code in the stream */
- CHECK_STREAM_PTR(1);
- pixel_ptr += (s->buf[stream_ptr++] - 1) * 4;
+ pixel_ptr += (bytestream2_get_byte(&s->g) - 1) * 4;
CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
} else if (rle_code < 0) {
/* decode the run length code */
rle_code = -rle_code;
- CHECK_STREAM_PTR(4);
- a = s->buf[stream_ptr++];
- r = s->buf[stream_ptr++];
- g = s->buf[stream_ptr++];
- b = s->buf[stream_ptr++];
- argb = (a << 24) | (r << 16) | (g << 8) | (b << 0);
+ argb = bytestream2_get_be32(&s->g);
CHECK_PIXEL_PTR(rle_code * 4);
while (rle_code--) {
- *(unsigned int *)(&rgb[pixel_ptr]) = argb;
+ AV_WN32A(rgb + pixel_ptr, argb);
pixel_ptr += 4;
}
} else {
- CHECK_STREAM_PTR(rle_code * 4);
CHECK_PIXEL_PTR(rle_code * 4);
/* copy pixels directly to output */
while (rle_code--) {
- a = s->buf[stream_ptr++];
- r = s->buf[stream_ptr++];
- g = s->buf[stream_ptr++];
- b = s->buf[stream_ptr++];
- argb = (a << 24) | (r << 16) | (g << 8) | (b << 0);
- *(unsigned int *)(&rgb[pixel_ptr]) = argb;
- pixel_ptr += 4;
+ argb = bytestream2_get_be32(&s->g);
+ AV_WN32A(rgb + pixel_ptr, argb);
+ pixel_ptr += 4;
}
}
}
switch (avctx->bits_per_coded_sample) {
case 1:
case 33:
- avctx->pix_fmt = PIX_FMT_MONOWHITE;
+ avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
break;
case 2:
case 34:
case 36:
case 40:
- avctx->pix_fmt = PIX_FMT_PAL8;
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
break;
case 16:
- avctx->pix_fmt = PIX_FMT_RGB555;
+ avctx->pix_fmt = AV_PIX_FMT_RGB555;
break;
case 24:
- avctx->pix_fmt = PIX_FMT_RGB24;
+ avctx->pix_fmt = AV_PIX_FMT_RGB24;
break;
case 32:
- avctx->pix_fmt = PIX_FMT_RGB32;
+ avctx->pix_fmt = AV_PIX_FMT_RGB32;
break;
default:
av_log (avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
avctx->bits_per_coded_sample);
- break;
+ return AVERROR_INVALIDDATA;
}
s->frame.data[0] = NULL;
static int qtrle_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- const uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
QtrleContext *s = avctx->priv_data;
int header, start_line;
- int stream_ptr, height, row_ptr;
+ int height, row_ptr;
int has_palette = 0;
- s->buf = buf;
- s->size = buf_size;
-
+ bytestream2_init(&s->g, avpkt->data, avpkt->size);
s->frame.reference = 1;
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
FF_BUFFER_HINTS_REUSABLE | FF_BUFFER_HINTS_READABLE;
}
/* check if this frame is even supposed to change */
- if (s->size < 8)
+ if (avpkt->size < 8)
goto done;
/* start after the chunk size */
- stream_ptr = 4;
+ bytestream2_seek(&s->g, 4, SEEK_SET);
/* fetch the header */
- header = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 2;
+ header = bytestream2_get_be16(&s->g);
/* if a header is present, fetch additional decoding parameters */
if (header & 0x0008) {
- if(s->size < 14)
+ if (avpkt->size < 14)
goto done;
- start_line = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- height = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
+ start_line = bytestream2_get_be16(&s->g);
+ bytestream2_skip(&s->g, 2);
+ height = bytestream2_get_be16(&s->g);
+ bytestream2_skip(&s->g, 2);
} else {
start_line = 0;
- height = s->avctx->height;
+ height = s->avctx->height;
}
row_ptr = s->frame.linesize[0] * start_line;
switch (avctx->bits_per_coded_sample) {
case 1:
case 33:
- qtrle_decode_1bpp(s, stream_ptr, row_ptr, height);
+ qtrle_decode_1bpp(s, row_ptr, height);
break;
case 2:
case 34:
- qtrle_decode_2n4bpp(s, stream_ptr, row_ptr, height, 2);
+ qtrle_decode_2n4bpp(s, row_ptr, height, 2);
has_palette = 1;
break;
case 4:
case 36:
- qtrle_decode_2n4bpp(s, stream_ptr, row_ptr, height, 4);
+ qtrle_decode_2n4bpp(s, row_ptr, height, 4);
has_palette = 1;
break;
case 8:
case 40:
- qtrle_decode_8bpp(s, stream_ptr, row_ptr, height);
+ qtrle_decode_8bpp(s, row_ptr, height);
has_palette = 1;
break;
case 16:
- qtrle_decode_16bpp(s, stream_ptr, row_ptr, height);
+ qtrle_decode_16bpp(s, row_ptr, height);
break;
case 24:
- qtrle_decode_24bpp(s, stream_ptr, row_ptr, height);
+ qtrle_decode_24bpp(s, row_ptr, height);
break;
case 32:
- qtrle_decode_32bpp(s, stream_ptr, row_ptr, height);
+ qtrle_decode_32bpp(s, row_ptr, height);
break;
default:
}
if(has_palette) {
- /* make the palette available on the way out */
- memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
- if (s->avctx->palctrl->palette_changed) {
+ const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
+
+ if (pal) {
s->frame.palette_has_changed = 1;
- s->avctx->palctrl->palette_changed = 0;
+ memcpy(s->pal, pal, AVPALETTE_SIZE);
}
+
+ /* make the palette available on the way out */
+ memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE);
}
done:
*(AVFrame*)data = s->frame;
/* always report that the buffer was completely consumed */
- return buf_size;
+ return avpkt->size;
}
static av_cold int qtrle_decode_end(AVCodecContext *avctx)
return 0;
}
-AVCodec qtrle_decoder = {
- "qtrle",
- CODEC_TYPE_VIDEO,
- CODEC_ID_QTRLE,
- sizeof(QtrleContext),
- qtrle_decode_init,
- NULL,
- qtrle_decode_end,
- qtrle_decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
+AVCodec ff_qtrle_decoder = {
+ .name = "qtrle",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_QTRLE,
+ .priv_data_size = sizeof(QtrleContext),
+ .init = qtrle_decode_init,
+ .close = qtrle_decode_end,
+ .decode = qtrle_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
};
-
projects / ffmpeg / blobdiff