* Delphine Software International CIN Audio/Video Decoders
* Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
*
- * 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 dsicinav.c
+ * @file
* Delphine Software International CIN audio/video decoders
*/
#include "avcodec.h"
-#include "common.h"
+#include "bytestream.h"
+#include "mathops.h"
typedef enum CinVideoBitmapIndex {
} CinVideoContext;
typedef struct CinAudioContext {
- AVCodecContext *avctx;
+ AVFrame frame;
int initial_decode_frame;
int delta;
} CinAudioContext;
};
-static int cinvideo_decode_init(AVCodecContext *avctx)
+static av_cold int cinvideo_decode_init(AVCodecContext *avctx)
{
- CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
+ CinVideoContext *cin = avctx->priv_data;
unsigned int i;
cin->avctx = avctx;
static int cinvideo_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
- CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ CinVideoContext *cin = avctx->priv_data;
int i, y, palette_type, palette_colors_count, bitmap_frame_type, bitmap_frame_size;
cin->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
}
palette_type = buf[0];
- palette_colors_count = buf[1] | (buf[2] << 8);
+ palette_colors_count = AV_RL16(buf+1);
bitmap_frame_type = buf[3];
buf += 4;
bitmap_frame_size = buf_size - 4;
/* handle palette */
+ if (bitmap_frame_size < palette_colors_count * (3 + (palette_type != 0)))
+ return AVERROR_INVALIDDATA;
if (palette_type == 0) {
+ if (palette_colors_count > 256)
+ return AVERROR_INVALIDDATA;
for (i = 0; i < palette_colors_count; ++i) {
- cin->palette[i] = (buf[2] << 16) | (buf[1] << 8) | buf[0];
- buf += 3;
+ cin->palette[i] = bytestream_get_le24(&buf);
bitmap_frame_size -= 3;
}
} else {
for (i = 0; i < palette_colors_count; ++i) {
- cin->palette[buf[0]] = (buf[3] << 16) | (buf[2] << 8) | buf[1];
+ cin->palette[buf[0]] = AV_RL24(buf+1);
buf += 4;
bitmap_frame_size -= 4;
}
return buf_size;
}
-static int cinvideo_decode_end(AVCodecContext *avctx)
+static av_cold int cinvideo_decode_end(AVCodecContext *avctx)
{
- CinVideoContext *cin = (CinVideoContext *)avctx->priv_data;
+ CinVideoContext *cin = avctx->priv_data;
int i;
if (cin->frame.data[0])
return 0;
}
-static int cinaudio_decode_init(AVCodecContext *avctx)
+static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
{
- CinAudioContext *cin = (CinAudioContext *)avctx->priv_data;
+ CinAudioContext *cin = avctx->priv_data;
+
+ if (avctx->channels != 1) {
+ av_log_ask_for_sample(avctx, "Number of channels is not supported\n");
+ return AVERROR_PATCHWELCOME;
+ }
- cin->avctx = avctx;
cin->initial_decode_frame = 1;
cin->delta = 0;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+
+ avcodec_get_frame_defaults(&cin->frame);
+ avctx->coded_frame = &cin->frame;
return 0;
}
-static int cinaudio_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
- CinAudioContext *cin = (CinAudioContext *)avctx->priv_data;
- uint8_t *src = buf;
- int16_t *samples = (int16_t *)data;
+ const uint8_t *buf = avpkt->data;
+ CinAudioContext *cin = avctx->priv_data;
+ const uint8_t *buf_end = buf + avpkt->size;
+ int16_t *samples;
+ int delta, ret;
+
+ /* get output buffer */
+ cin->frame.nb_samples = avpkt->size - cin->initial_decode_frame;
+ if ((ret = avctx->get_buffer(avctx, &cin->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ samples = (int16_t *)cin->frame.data[0];
+ delta = cin->delta;
if (cin->initial_decode_frame) {
cin->initial_decode_frame = 0;
- cin->delta = (int16_t)AV_RL16(src); src += 2;
- *samples++ = cin->delta;
- buf_size -= 2;
+ delta = sign_extend(AV_RL16(buf), 16);
+ buf += 2;
+ *samples++ = delta;
}
- while (buf_size > 0) {
- cin->delta += cinaudio_delta16_table[*src++];
- cin->delta = av_clip(cin->delta, -32768, 32767);
- *samples++ = cin->delta;
- --buf_size;
+ while (buf < buf_end) {
+ delta += cinaudio_delta16_table[*buf++];
+ delta = av_clip_int16(delta);
+ *samples++ = delta;
}
+ cin->delta = delta;
- *data_size = (uint8_t *)samples - (uint8_t *)data;
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = cin->frame;
- return src - buf;
+ return avpkt->size;
}
-AVCodec dsicinvideo_decoder = {
- "dsicinvideo",
- CODEC_TYPE_VIDEO,
- CODEC_ID_DSICINVIDEO,
- sizeof(CinVideoContext),
- cinvideo_decode_init,
- NULL,
- cinvideo_decode_end,
- cinvideo_decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_dsicinvideo_decoder = {
+ .name = "dsicinvideo",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_DSICINVIDEO,
+ .priv_data_size = sizeof(CinVideoContext),
+ .init = cinvideo_decode_init,
+ .close = cinvideo_decode_end,
+ .decode = cinvideo_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN video"),
};
-AVCodec dsicinaudio_decoder = {
- "dsicinaudio",
- CODEC_TYPE_AUDIO,
- CODEC_ID_DSICINAUDIO,
- sizeof(CinAudioContext),
- cinaudio_decode_init,
- NULL,
- NULL,
- cinaudio_decode_frame,
+AVCodec ff_dsicinaudio_decoder = {
+ .name = "dsicinaudio",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_DSICINAUDIO,
+ .priv_data_size = sizeof(CinAudioContext),
+ .init = cinaudio_decode_init,
+ .decode = cinaudio_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
};
projects / ffmpeg / blobdiff