* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include "libavutil/bswap.h"
+#include "libavutil/common.h"
#include "libavutil/lzo.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
int quality;
int width, height;
unsigned int decomp_size;
- unsigned char* decomp_buf;
+ unsigned char *decomp_buf;
uint32_t lq[64], cq[64];
RTJpegContext rtj;
DSPContext dsp;
* @param width width of the video frame
* @param height height of the video frame
*/
-static void copy_frame(AVFrame *f, const uint8_t *src,
- int width, int height) {
+static void copy_frame(AVFrame *f, const uint8_t *src, int width, int height)
+{
AVPicture pic;
avpicture_fill(&pic, src, PIX_FMT_YUV420P, width, height);
av_picture_copy((AVPicture *)f, &pic, PIX_FMT_YUV420P, width, height);
/**
* @brief extract quantization tables from codec data into our context
*/
-static int get_quant(AVCodecContext *avctx, NuvContext *c,
- const uint8_t *buf, int size) {
+static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf,
+ int size)
+{
int i;
if (size < 2 * 64 * 4) {
av_log(avctx, AV_LOG_ERROR, "insufficient rtjpeg quant data\n");
/**
* @brief set quantization tables from a quality value
*/
-static void get_quant_quality(NuvContext *c, int quality) {
+static void get_quant_quality(NuvContext *c, int quality)
+{
int i;
quality = FFMAX(quality, 1);
for (i = 0; i < 64; i++) {
}
}
-static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality) {
+static int codec_reinit(AVCodecContext *avctx, int width, int height,
+ int quality)
+{
NuvContext *c = avctx->priv_data;
width = FFALIGN(width, 2);
height = FFALIGN(height, 2);
if (av_image_check_size(height, width, 0, avctx) < 0 ||
buf_size > INT_MAX/8)
return -1;
- avctx->width = c->width = width;
+ avctx->width = c->width = width;
avctx->height = c->height = height;
- av_fast_malloc(&c->decomp_buf, &c->decomp_size, buf_size);
+ av_fast_malloc(&c->decomp_buf, &c->decomp_size,
+ buf_size);
if (!c->decomp_buf) {
- av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
+ av_log(avctx, AV_LOG_ERROR,
+ "Can't allocate decompression buffer.\n");
return AVERROR(ENOMEM);
}
- ff_rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
+ ff_rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height,
+ c->lq, c->cq);
return 1;
} else if (quality != c->quality)
- ff_rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
+ ff_rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height,
+ c->lq, c->cq);
+
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
- AVPacket *avpkt) {
+ AVPacket *avpkt)
+{
const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- NuvContext *c = avctx->priv_data;
- AVFrame *picture = data;
- int orig_size = buf_size;
+ int buf_size = avpkt->size;
+ NuvContext *c = avctx->priv_data;
+ AVFrame *picture = data;
+ int orig_size = buf_size;
int keyframe;
int size_change = 0;
int result;
- enum {NUV_UNCOMPRESSED = '0', NUV_RTJPEG = '1',
- NUV_RTJPEG_IN_LZO = '2', NUV_LZO = '3',
- NUV_BLACK = 'N', NUV_COPY_LAST = 'L'} comptype;
+ enum {
+ NUV_UNCOMPRESSED = '0',
+ NUV_RTJPEG = '1',
+ NUV_RTJPEG_IN_LZO = '2',
+ NUV_LZO = '3',
+ NUV_BLACK = 'N',
+ NUV_COPY_LAST = 'L'
+ } comptype;
if (buf_size < 12) {
av_log(avctx, AV_LOG_ERROR, "coded frame too small\n");
if (buf[0] == 'D' && buf[1] == 'R') {
int ret;
// skip rest of the frameheader.
- buf = &buf[12];
+ buf = &buf[12];
buf_size -= 12;
- ret = get_quant(avctx, c, buf, buf_size);
+ ret = get_quant(avctx, c, buf, buf_size);
if (ret < 0)
return ret;
- ff_rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq, c->cq);
+ ff_rtjpeg_decode_init(&c->rtj, &c->dsp, c->width, c->height, c->lq,
+ c->cq);
return orig_size;
}
}
comptype = buf[1];
switch (comptype) {
- case NUV_RTJPEG_IN_LZO:
- case NUV_RTJPEG:
- keyframe = !buf[2]; break;
- case NUV_COPY_LAST:
- keyframe = 0; break;
- default:
- keyframe = 1; break;
+ case NUV_RTJPEG_IN_LZO:
+ case NUV_RTJPEG:
+ keyframe = !buf[2];
+ break;
+ case NUV_COPY_LAST:
+ keyframe = 0;
+ break;
+ default:
+ keyframe = 1;
+ break;
}
retry:
// skip rest of the frameheader.
- buf = &buf[12];
+ buf = &buf[12];
buf_size -= 12;
if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
int outlen = c->decomp_size - AV_LZO_OUTPUT_PADDING, inlen = buf_size;
if (av_lzo1x_decode(c->decomp_buf, &outlen, buf, &inlen))
av_log(avctx, AV_LOG_ERROR, "error during lzo decompression\n");
- buf = c->decomp_buf;
+ buf = c->decomp_buf;
buf_size = c->decomp_size - AV_LZO_OUTPUT_PADDING - outlen;
}
if (c->codec_frameheader) {
- int w, h, q, res;
- if (buf_size < 12) {
+ int w, h, q;
+ int res;
+ if (buf_size < RTJPEG_HEADER_SIZE) {
av_log(avctx, AV_LOG_ERROR, "Too small NUV video frame\n");
return AVERROR_INVALIDDATA;
}
size_change = 1;
goto retry;
}
- buf = &buf[12];
- buf_size -= 12;
+ buf = &buf[RTJPEG_HEADER_SIZE];
+ buf_size -= RTJPEG_HEADER_SIZE;
}
if ((size_change || keyframe) && c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
- c->pic.reference = 3;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_READABLE |
+ c->pic.reference = 3;
+ c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_READABLE |
FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
result = avctx->reget_buffer(avctx, &c->pic);
if (result < 0) {
c->pic.key_frame = keyframe;
// decompress/copy/whatever data
switch (comptype) {
- case NUV_LZO:
- case NUV_UNCOMPRESSED: {
- int height = c->height;
- if (buf_size < c->width * height * 3 / 2) {
- av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
- height = buf_size / c->width / 3 * 2;
- }
- copy_frame(&c->pic, buf, c->width, height);
- break;
- }
- case NUV_RTJPEG_IN_LZO:
- case NUV_RTJPEG: {
- ff_rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, buf, buf_size);
- break;
+ case NUV_LZO:
+ case NUV_UNCOMPRESSED: {
+ int height = c->height;
+ if (buf_size < c->width * height * 3 / 2) {
+ av_log(avctx, AV_LOG_ERROR, "uncompressed frame too short\n");
+ height = buf_size / c->width / 3 * 2;
}
- case NUV_BLACK: {
- memset(c->pic.data[0], 0, c->width * c->height);
- memset(c->pic.data[1], 128, c->width * c->height / 4);
- memset(c->pic.data[2], 128, c->width * c->height / 4);
- break;
- }
- case NUV_COPY_LAST: {
- /* nothing more to do here */
- break;
- }
- default:
- av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
- return -1;
+ copy_frame(&c->pic, buf, c->width, height);
+ break;
+ }
+ case NUV_RTJPEG_IN_LZO:
+ case NUV_RTJPEG:
+ ff_rtjpeg_decode_frame_yuv420(&c->rtj, &c->pic, buf, buf_size);
+ break;
+ case NUV_BLACK:
+ memset(c->pic.data[0], 0, c->width * c->height);
+ memset(c->pic.data[1], 128, c->width * c->height / 4);
+ memset(c->pic.data[2], 128, c->width * c->height / 4);
+ break;
+ case NUV_COPY_LAST:
+ /* nothing more to do here */
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "unknown compression\n");
+ return -1;
}
- *picture = c->pic;
+ *picture = c->pic;
*data_size = sizeof(AVFrame);
return orig_size;
}
-static av_cold int decode_init(AVCodecContext *avctx) {
- NuvContext *c = avctx->priv_data;
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ NuvContext *c = avctx->priv_data;
avctx->pix_fmt = PIX_FMT_YUV420P;
c->pic.data[0] = NULL;
- c->decomp_buf = NULL;
- c->quality = -1;
- c->width = 0;
- c->height = 0;
+ c->decomp_buf = NULL;
+ c->quality = -1;
+ c->width = 0;
+ c->height = 0;
+
c->codec_frameheader = avctx->codec_tag == MKTAG('R', 'J', 'P', 'G');
+
if (avctx->extradata_size)
get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
+
ff_dsputil_init(&c->dsp, avctx);
+
if (codec_reinit(avctx, avctx->width, avctx->height, -1) < 0)
return 1;
+
return 0;
}
-static av_cold int decode_end(AVCodecContext *avctx) {
+static av_cold int decode_end(AVCodecContext *avctx)
+{
NuvContext *c = avctx->priv_data;
+
av_freep(&c->decomp_buf);
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
+
return 0;
}
AVCodec ff_nuv_decoder = {
.name = "nuv",
.type = AVMEDIA_TYPE_VIDEO,
- .id = CODEC_ID_NUV,
+ .id = AV_CODEC_ID_NUV,
.priv_data_size = sizeof(NuvContext),
.init = decode_init,
.close = decode_end,