/*
* Canopus Lossless Codec decoder
*
- * Copyright (c) 2012 Derek Buitenhuis
+ * Copyright (c) 2012-2013 Derek Buitenhuis
*
* This file is part of Libav.
*
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <inttypes.h>
+
#include "libavutil/intreadwrite.h"
-#include "dsputil.h"
+#include "bswapdsp.h"
+#include "canopus.h"
#include "get_bits.h"
#include "avcodec.h"
+#include "internal.h"
typedef struct CLLCContext {
- DSPContext dsp;
AVCodecContext *avctx;
+ BswapDSPContext bdsp;
uint8_t *swapped_buf;
int swapped_buf_size;
CLOSE_READER(bits, gb);
- dst -= 4 * ctx->avctx->width;
- top_left[0] = dst[0];
+ top_left[0] = outbuf[0];
/* Only stash components if they are not transparent */
if (top_left[0]) {
- top_left[1] = dst[1];
- top_left[2] = dst[2];
- top_left[3] = dst[3];
+ top_left[1] = outbuf[1];
+ top_left[2] = outbuf[2];
+ top_left[3] = outbuf[3];
}
return 0;
CLOSE_READER(bits, gb);
/* Stash the first pixel */
- *top_left = dst[-3 * ctx->avctx->width];
+ *top_left = outbuf[0];
+
+ return 0;
+}
+
+static int read_yuv_component_line(CLLCContext *ctx, GetBitContext *gb,
+ int *top_left, VLC *vlc, uint8_t *outbuf,
+ int is_chroma)
+{
+ int pred, code;
+ int i;
+
+ OPEN_READER(bits, gb);
+
+ pred = *top_left;
+
+ /* Simultaneously read and restore the line */
+ for (i = 0; i < ctx->avctx->width >> is_chroma; i++) {
+ UPDATE_CACHE(bits, gb);
+ GET_VLC(code, bits, gb, vlc->table, 7, 2);
+
+ pred += code;
+ outbuf[i] = pred;
+ }
+
+ CLOSE_READER(bits, gb);
+
+ /* Stash the first pixel */
+ *top_left = outbuf[0];
return 0;
}
return 0;
}
+static int decode_yuv_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic)
+{
+ AVCodecContext *avctx = ctx->avctx;
+ uint8_t block;
+ uint8_t *dst[3];
+ int pred[3];
+ int ret;
+ int i, j;
+ VLC vlc[2];
+
+ pred[0] = 0x80;
+ pred[1] = 0x80;
+ pred[2] = 0x80;
+
+ dst[0] = pic->data[0];
+ dst[1] = pic->data[1];
+ dst[2] = pic->data[2];
+
+ skip_bits(gb, 8);
+
+ block = get_bits(gb, 8);
+ if (block) {
+ avpriv_request_sample(ctx->avctx, "Blocked YUV");
+ return AVERROR_PATCHWELCOME;
+ }
+
+ /* Read in code table for luma and chroma */
+ for (i = 0; i < 2; i++) {
+ ret = read_code_table(ctx, gb, &vlc[i]);
+ if (ret < 0) {
+ for (j = 0; j <= i; j++)
+ ff_free_vlc(&vlc[j]);
+
+ av_log(ctx->avctx, AV_LOG_ERROR,
+ "Could not read code table %d.\n", i);
+ return ret;
+ }
+ }
+
+ /* Read in and restore every line */
+ for (i = 0; i < avctx->height; i++) {
+ read_yuv_component_line(ctx, gb, &pred[0], &vlc[0], dst[0], 0); /* Y */
+ read_yuv_component_line(ctx, gb, &pred[1], &vlc[1], dst[1], 1); /* U */
+ read_yuv_component_line(ctx, gb, &pred[2], &vlc[1], dst[2], 1); /* V */
+
+ for (j = 0; j < 3; j++)
+ dst[j] += pic->linesize[j];
+ }
+
+ for (i = 0; i < 2; i++)
+ ff_free_vlc(&vlc[i]);
+
+ return 0;
+}
+
static int cllc_decode_frame(AVCodecContext *avctx, void *data,
int *got_picture_ptr, AVPacket *avpkt)
{
CLLCContext *ctx = avctx->priv_data;
- AVFrame *pic = avctx->coded_frame;
+ AVFrame *pic = data;
uint8_t *src = avpkt->data;
uint32_t info_tag, info_offset;
int data_size;
GetBitContext gb;
int coding_type, ret;
- if (pic->data[0])
- avctx->release_buffer(avctx, pic);
-
- pic->reference = 0;
+ if (avpkt->size < 4 + 4) {
+ av_log(avctx, AV_LOG_ERROR, "Frame is too small %d.\n", avpkt->size);
+ return AVERROR_INVALIDDATA;
+ }
- /* Skip the INFO header if present */
info_offset = 0;
info_tag = AV_RL32(src);
if (info_tag == MKTAG('I', 'N', 'F', 'O')) {
info_offset = AV_RL32(src + 4);
if (info_offset > UINT32_MAX - 8 || info_offset + 8 > avpkt->size) {
av_log(avctx, AV_LOG_ERROR,
- "Invalid INFO header offset: 0x%08X is too large.\n",
+ "Invalid INFO header offset: 0x%08"PRIX32" is too large.\n",
info_offset);
return AVERROR_INVALIDDATA;
}
+ ff_canopus_parse_info_tag(avctx, src + 8, info_offset);
info_offset += 8;
src += info_offset;
-
- av_log(avctx, AV_LOG_DEBUG, "Skipping INFO chunk.\n");
}
data_size = (avpkt->size - info_offset) & ~1;
}
/* bswap16 the buffer since CLLC's bitreader works in 16-bit words */
- ctx->dsp.bswap16_buf((uint16_t *) ctx->swapped_buf, (uint16_t *) src,
- data_size / 2);
+ ctx->bdsp.bswap16_buf((uint16_t *) ctx->swapped_buf, (uint16_t *) src,
+ data_size / 2);
init_get_bits(&gb, ctx->swapped_buf, data_size * 8);
av_log(avctx, AV_LOG_DEBUG, "Frame coding type: %d\n", coding_type);
switch (coding_type) {
+ case 0:
+ avctx->pix_fmt = AV_PIX_FMT_YUV422P;
+ avctx->bits_per_raw_sample = 8;
+
+ ret = ff_get_buffer(avctx, pic, 0);
+ if (ret < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
+ return ret;
+ }
+
+ ret = decode_yuv_frame(ctx, &gb, pic);
+ if (ret < 0)
+ return ret;
+
+ break;
case 1:
case 2:
- avctx->pix_fmt = PIX_FMT_RGB24;
+ avctx->pix_fmt = AV_PIX_FMT_RGB24;
avctx->bits_per_raw_sample = 8;
- ret = avctx->get_buffer(avctx, pic);
+ ret = ff_get_buffer(avctx, pic, 0);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
return ret;
break;
case 3:
- avctx->pix_fmt = PIX_FMT_ARGB;
+ avctx->pix_fmt = AV_PIX_FMT_ARGB;
avctx->bits_per_raw_sample = 8;
- ret = avctx->get_buffer(avctx, pic);
+ ret = ff_get_buffer(avctx, pic, 0);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
return ret;
pic->pict_type = AV_PICTURE_TYPE_I;
*got_picture_ptr = 1;
- *(AVFrame *)data = *pic;
return avpkt->size;
}
{
CLLCContext *ctx = avctx->priv_data;
- if (avctx->coded_frame->data[0])
- avctx->release_buffer(avctx, avctx->coded_frame);
-
- av_freep(&avctx->coded_frame);
av_freep(&ctx->swapped_buf);
return 0;
ctx->swapped_buf = NULL;
ctx->swapped_buf_size = 0;
- ff_dsputil_init(&ctx->dsp, avctx);
-
- avctx->coded_frame = avcodec_alloc_frame();
- if (!avctx->coded_frame) {
- av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
- return AVERROR(ENOMEM);
- }
+ ff_bswapdsp_init(&ctx->bdsp);
return 0;
}
AVCodec ff_cllc_decoder = {
.name = "cllc",
+ .long_name = NULL_IF_CONFIG_SMALL("Canopus Lossless Codec"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_CLLC,
.priv_data_size = sizeof(CLLCContext),
.init = cllc_decode_init,
.decode = cllc_decode_frame,
.close = cllc_decode_close,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Canopus Lossless Codec"),
+ .capabilities = AV_CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff