* then this coded picture is packed with ZLib
*
* Supports: BGR8,BGR555,BGR24 - only BGR8 and BGR555 tested
- *
*/
#include <stdio.h>
#include <stdlib.h>
#include "avcodec.h"
+#include "internal.h"
#include "msrledec.h"
#include <zlib.h>
-
-/*
- * Decoder context
- */
typedef struct TsccContext {
AVCodecContext *avctx;
- AVFrame pic;
// Bits per pixel
int bpp;
unsigned int decomp_size;
// Decompression buffer
unsigned char* decomp_buf;
+ GetByteContext gb;
int height;
z_stream zstream;
uint32_t pal[256];
} CamtasiaContext;
-/*
- *
- * Decode a frame
- *
- */
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
+static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
+ AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
CamtasiaContext * const c = avctx->priv_data;
- const unsigned char *encoded = buf;
- int zret; // Zlib return code
- int len = buf_size;
+ AVFrame *frame = data;
+ int ret;
- if(c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
-
- c->pic.reference = 1;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
- if(avctx->get_buffer(avctx, &c->pic) < 0){
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
- zret = inflateReset(&(c->zstream));
- if (zret != Z_OK) {
- av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
- return -1;
+ ret = inflateReset(&c->zstream);
+ if (ret != Z_OK) {
+ av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
+ return AVERROR_UNKNOWN;
}
- c->zstream.next_in = encoded;
- c->zstream.avail_in = len;
+ c->zstream.next_in = buf;
+ c->zstream.avail_in = buf_size;
c->zstream.next_out = c->decomp_buf;
c->zstream.avail_out = c->decomp_size;
- zret = inflate(&(c->zstream), Z_FINISH);
+ ret = inflate(&c->zstream, Z_FINISH);
// Z_DATA_ERROR means empty picture
- if ((zret != Z_OK) && (zret != Z_STREAM_END) && (zret != Z_DATA_ERROR)) {
- av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret);
- return -1;
+ if ((ret != Z_OK) && (ret != Z_STREAM_END) && (ret != Z_DATA_ERROR)) {
+ av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", ret);
+ return AVERROR_UNKNOWN;
}
- if(zret != Z_DATA_ERROR)
- ff_msrle_decode(avctx, (AVPicture*)&c->pic, c->bpp, c->decomp_buf, c->decomp_size - c->zstream.avail_out);
+ if (ret != Z_DATA_ERROR) {
+ bytestream2_init(&c->gb, c->decomp_buf,
+ c->decomp_size - c->zstream.avail_out);
+ ff_msrle_decode(avctx, frame, c->bpp, &c->gb);
+ }
/* make the palette available on the way out */
- if (c->avctx->pix_fmt == PIX_FMT_PAL8) {
+ if (c->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
if (pal) {
- c->pic.palette_has_changed = 1;
+ frame->palette_has_changed = 1;
memcpy(c->pal, pal, AVPALETTE_SIZE);
}
- memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE);
+ memcpy(frame->data[1], c->pal, AVPALETTE_SIZE);
}
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = c->pic;
+ *got_frame = 1;
/* always report that the buffer was completely consumed */
return buf_size;
}
-
-
-/*
- *
- * Init tscc decoder
- *
- */
static av_cold int decode_init(AVCodecContext *avctx)
{
CamtasiaContext * const c = avctx->priv_data;
c->height = avctx->height;
// Needed if zlib unused or init aborted before inflateInit
- memset(&(c->zstream), 0, sizeof(z_stream));
+ memset(&c->zstream, 0, sizeof(z_stream));
switch(avctx->bits_per_coded_sample){
- case 8: avctx->pix_fmt = PIX_FMT_PAL8; break;
- case 16: avctx->pix_fmt = PIX_FMT_RGB555; break;
+ case 8: avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
+ case 16: avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
case 24:
- avctx->pix_fmt = PIX_FMT_BGR24;
+ avctx->pix_fmt = AV_PIX_FMT_BGR24;
break;
- case 32: avctx->pix_fmt = PIX_FMT_RGB32; break;
+ case 32: avctx->pix_fmt = AV_PIX_FMT_RGB32; break;
default: av_log(avctx, AV_LOG_ERROR, "Camtasia error: unknown depth %i bpp\n", avctx->bits_per_coded_sample);
- return -1;
+ return AVERROR_INVALIDDATA;
}
c->bpp = avctx->bits_per_coded_sample;
- // buffer size for RLE 'best' case when 2-byte code preceeds each pixel and there may be padding after it too
+ // buffer size for RLE 'best' case when 2-byte code precedes each pixel and there may be padding after it too
c->decomp_size = (((avctx->width * c->bpp + 7) >> 3) + 3 * avctx->width + 2) * avctx->height + 2;
/* Allocate decompression buffer */
if (c->decomp_size) {
- if ((c->decomp_buf = av_malloc(c->decomp_size)) == NULL) {
+ if (!(c->decomp_buf = av_malloc(c->decomp_size))) {
av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
- return 1;
+ return AVERROR(ENOMEM);
}
}
c->zstream.zalloc = Z_NULL;
c->zstream.zfree = Z_NULL;
c->zstream.opaque = Z_NULL;
- zret = inflateInit(&(c->zstream));
+ zret = inflateInit(&c->zstream);
if (zret != Z_OK) {
av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
- return 1;
+ return AVERROR_UNKNOWN;
}
return 0;
}
-
-
-/*
- *
- * Uninit tscc decoder
- *
- */
static av_cold int decode_end(AVCodecContext *avctx)
{
CamtasiaContext * const c = avctx->priv_data;
av_freep(&c->decomp_buf);
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
- inflateEnd(&(c->zstream));
+ inflateEnd(&c->zstream);
return 0;
}
AVCodec ff_tscc_decoder = {
.name = "camtasia",
+ .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Capture Codec"),
.type = AVMEDIA_TYPE_VIDEO,
- .id = CODEC_ID_TSCC,
+ .id = AV_CODEC_ID_TSCC,
.priv_data_size = sizeof(CamtasiaContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("TechSmith Screen Capture Codec"),
+ .capabilities = AV_CODEC_CAP_DR1,
};
-
projects / ffmpeg / blobdiff