* Microsoft Video-1 Decoder
* Copyright (C) 2003 the ffmpeg project
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file msvideo1.c
+ * @file
* Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
* For more information about the MS Video-1 format, visit:
* http://www.pcisys.net/~melanson/codecs/
*
- * This decoder outputs either PAL8 or RGB555 data, depending on the
- * whether a RGB palette was passed through palctrl;
- * if it's present, then the data is PAL8; RGB555 otherwise.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
-#include "common.h"
+#include "libavutil/internal.h"
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-#include "dsputil.h"
+#include "internal.h"
#define PALETTE_COUNT 256
#define CHECK_STREAM_PTR(n) \
typedef struct Msvideo1Context {
AVCodecContext *avctx;
- DSPContext dsp;
- AVFrame frame;
+ AVFrame *frame;
- unsigned char *buf;
+ const unsigned char *buf;
int size;
int mode_8bit; /* if it's not 8-bit, it's 16-bit */
+ uint32_t pal[256];
} Msvideo1Context;
-static int msvideo1_decode_init(AVCodecContext *avctx)
+static av_cold int msvideo1_decode_init(AVCodecContext *avctx)
{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+ Msvideo1Context *s = avctx->priv_data;
s->avctx = avctx;
/* figure out the colorspace based on the presence of a palette */
- if (s->avctx->palctrl) {
+ if (s->avctx->bits_per_coded_sample == 8) {
s->mode_8bit = 1;
- avctx->pix_fmt = PIX_FMT_PAL8;
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
} else {
s->mode_8bit = 0;
- avctx->pix_fmt = PIX_FMT_RGB555;
+ avctx->pix_fmt = AV_PIX_FMT_RGB555;
}
- avctx->has_b_frames = 0;
- dsputil_init(&s->dsp, avctx);
-
- s->frame.data[0] = NULL;
+ s->frame = av_frame_alloc();
+ if (!s->frame)
+ return AVERROR(ENOMEM);
return 0;
}
unsigned short flags;
int skip_blocks;
unsigned char colors[8];
- unsigned char *pixels = s->frame.data[0];
- int stride = s->frame.linesize[0];
+ unsigned char *pixels = s->frame->data[0];
+ int stride = s->frame->linesize[0];
stream_ptr = 0;
skip_blocks = 0;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
- pixels[pixel_ptr++] =
- colors[((pixel_y & 0x2) << 1) +
+ pixels[pixel_ptr++] =
+ colors[((pixel_y & 0x2) << 1) +
(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
pixel_ptr -= row_dec;
}
}
/* make the palette available on the way out */
- if (s->avctx->pix_fmt == PIX_FMT_PAL8) {
- memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
- if (s->avctx->palctrl->palette_changed) {
- s->frame.palette_has_changed = 1;
- s->avctx->palctrl->palette_changed = 0;
- }
- }
+ if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
+ memcpy(s->frame->data[1], s->pal, AVPALETTE_SIZE);
}
static void msvideo1_decode_16bit(Msvideo1Context *s)
unsigned short flags;
int skip_blocks;
unsigned short colors[8];
- unsigned short *pixels = (unsigned short *)s->frame.data[0];
- int stride = s->frame.linesize[0] / 2;
+ unsigned short *pixels = (unsigned short *)s->frame->data[0];
+ int stride = s->frame->linesize[0] / 2;
stream_ptr = 0;
skip_blocks = 0;
flags = (byte_b << 8) | byte_a;
CHECK_STREAM_PTR(4);
- colors[0] = LE_16(&s->buf[stream_ptr]);
+ colors[0] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[1] = LE_16(&s->buf[stream_ptr]);
+ colors[1] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
if (colors[0] & 0x8000) {
/* 8-color encoding */
CHECK_STREAM_PTR(12);
- colors[2] = LE_16(&s->buf[stream_ptr]);
+ colors[2] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[3] = LE_16(&s->buf[stream_ptr]);
+ colors[3] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[4] = LE_16(&s->buf[stream_ptr]);
+ colors[4] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[5] = LE_16(&s->buf[stream_ptr]);
+ colors[5] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[6] = LE_16(&s->buf[stream_ptr]);
+ colors[6] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
- colors[7] = LE_16(&s->buf[stream_ptr]);
+ colors[7] = AV_RL16(&s->buf[stream_ptr]);
stream_ptr += 2;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++, flags >>= 1)
- pixels[pixel_ptr++] =
- colors[((pixel_y & 0x2) << 1) +
+ pixels[pixel_ptr++] =
+ colors[((pixel_y & 0x2) << 1) +
(pixel_x & 0x2) + ((flags & 0x1) ^ 1)];
pixel_ptr -= row_dec;
}
}
static int msvideo1_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ void *data, int *got_frame,
+ AVPacket *avpkt)
{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
-
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ Msvideo1Context *s = avctx->priv_data;
+ int ret;
s->buf = buf;
s->size = buf_size;
- s->frame.reference = 1;
- s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
- if (avctx->reget_buffer(avctx, &s->frame)) {
+ if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
- return -1;
+ return ret;
+ }
+
+ if (s->mode_8bit) {
+ const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
+
+ if (pal) {
+ memcpy(s->pal, pal, AVPALETTE_SIZE);
+ s->frame->palette_has_changed = 1;
+ }
}
if (s->mode_8bit)
else
msvideo1_decode_16bit(s);
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->frame;
+ if ((ret = av_frame_ref(data, s->frame)) < 0)
+ return ret;
+
+ *got_frame = 1;
/* report that the buffer was completely consumed */
return buf_size;
}
-static int msvideo1_decode_end(AVCodecContext *avctx)
+static av_cold int msvideo1_decode_end(AVCodecContext *avctx)
{
- Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+ Msvideo1Context *s = avctx->priv_data;
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
+ av_frame_free(&s->frame);
return 0;
}
-AVCodec msvideo1_decoder = {
- "msvideo1",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MSVIDEO1,
- sizeof(Msvideo1Context),
- msvideo1_decode_init,
- NULL,
- msvideo1_decode_end,
- msvideo1_decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_msvideo1_decoder = {
+ .name = "msvideo1",
+ .long_name = NULL_IF_CONFIG_SMALL("Microsoft Video 1"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_MSVIDEO1,
+ .priv_data_size = sizeof(Msvideo1Context),
+ .init = msvideo1_decode_init,
+ .close = msvideo1_decode_end,
+ .decode = msvideo1_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff