*/
#include "avformat.h"
+#include "rtpdec.h"
#include "rtpdec_formats.h"
#include "libavutil/intreadwrite.h"
#include "libavcodec/mjpeg.h"
AVIOContext *frame; ///< current frame buffer
uint32_t timestamp; ///< current frame timestamp
int hdr_size; ///< size of the current frame header
+ uint8_t qtables[128][128];
+ uint8_t qtables_len[128];
};
static const uint8_t default_quantizers[128] = {
/* SOF0 */
jpeg_put_marker(&pbc, SOF0);
- bytestream2_put_be16(&pbc, 17);
- bytestream2_put_byte(&pbc, 8);
+ bytestream2_put_be16(&pbc, 17); /* size */
+ bytestream2_put_byte(&pbc, 8); /* bits per component */
bytestream2_put_be16(&pbc, h);
bytestream2_put_be16(&pbc, w);
- bytestream2_put_byte(&pbc, 3);
- bytestream2_put_byte(&pbc, 1);
- bytestream2_put_byte(&pbc, type ? 34 : 33);
- bytestream2_put_byte(&pbc, 0);
- bytestream2_put_byte(&pbc, 2);
- bytestream2_put_byte(&pbc, 17);
- bytestream2_put_byte(&pbc, nb_qtable == 2 ? 1 : 0);
- bytestream2_put_byte(&pbc, 3);
- bytestream2_put_byte(&pbc, 17);
- bytestream2_put_byte(&pbc, nb_qtable == 2 ? 1 : 0);
+ bytestream2_put_byte(&pbc, 3); /* number of components */
+ bytestream2_put_byte(&pbc, 1); /* component number */
+ bytestream2_put_byte(&pbc, (2 << 4) | (type ? 2 : 1)); /* hsample/vsample */
+ bytestream2_put_byte(&pbc, 0); /* matrix number */
+ bytestream2_put_byte(&pbc, 2); /* component number */
+ bytestream2_put_byte(&pbc, 1 << 4 | 1); /* hsample/vsample */
+ bytestream2_put_byte(&pbc, nb_qtable == 2 ? 1 : 0); /* matrix number */
+ bytestream2_put_byte(&pbc, 3); /* component number */
+ bytestream2_put_byte(&pbc, 1 << 4 | 1); /* hsample/vsample */
+ bytestream2_put_byte(&pbc, nb_qtable == 2 ? 1 : 0); /* matrix number */
/* SOS */
jpeg_put_marker(&pbc, SOS);
static int jpeg_parse_packet(AVFormatContext *ctx, PayloadContext *jpeg,
AVStream *st, AVPacket *pkt, uint32_t *timestamp,
- const uint8_t *buf, int len, int flags)
+ const uint8_t *buf, int len, uint16_t seq,
+ int flags)
{
uint8_t type, q, width, height;
const uint8_t *qtables = NULL;
"Unimplemented RTP/JPEG restart marker header.\n");
return AVERROR_PATCHWELCOME;
}
+ if (type > 1) {
+ av_log(ctx, AV_LOG_ERROR, "Unimplemented RTP/JPEG type %d\n", type);
+ return AVERROR_PATCHWELCOME;
+ }
/* Parse the quantization table header. */
if (off == 0) {
if (precision)
av_log(ctx, AV_LOG_WARNING, "Only 8-bit precision is supported.\n");
- if (q == 255 && qtable_len == 0) {
- av_log(ctx, AV_LOG_ERROR,
- "Invalid RTP/JPEG packet. Quantization tables not found.\n");
- return AVERROR_INVALIDDATA;
- }
-
if (qtable_len > 0) {
if (len < qtable_len) {
av_log(ctx, AV_LOG_ERROR, "Too short RTP/JPEG packet.\n");
qtables = buf;
buf += qtable_len;
len -= qtable_len;
+ if (q < 255) {
+ if (jpeg->qtables_len[q - 128] &&
+ (jpeg->qtables_len[q - 128] != qtable_len ||
+ memcmp(qtables, &jpeg->qtables[q - 128][0], qtable_len))) {
+ av_log(ctx, AV_LOG_WARNING,
+ "Quantization tables for q=%d changed\n", q);
+ } else if (!jpeg->qtables_len[q - 128] && qtable_len <= 128) {
+ memcpy(&jpeg->qtables[q - 128][0], qtables,
+ qtable_len);
+ jpeg->qtables_len[q - 128] = qtable_len;
+ }
+ }
+ } else {
+ if (q == 255) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Invalid RTP/JPEG packet. Quantization tables not found.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if (!jpeg->qtables_len[q - 128]) {
+ av_log(ctx, AV_LOG_ERROR,
+ "No quantization tables known for q=%d yet.\n", q);
+ return AVERROR_INVALIDDATA;
+ }
+ qtables = &jpeg->qtables[q - 128][0];
+ qtable_len = jpeg->qtables_len[q - 128];
+ }
+ } else { /* q <= 127 */
+ if (q == 0 || q > 99) {
+ av_log(ctx, AV_LOG_ERROR, "Reserved q value %d\n", q);
+ return AVERROR_INVALIDDATA;
}
+ create_default_qtables(new_qtables, q);
+ qtables = new_qtables;
+ qtable_len = sizeof(new_qtables);
}
/* Skip the current frame in case of the end packet
return ret;
jpeg->timestamp = *timestamp;
- if (!qtables) {
- create_default_qtables(new_qtables, q);
- qtables = new_qtables;
- qtable_len = sizeof(new_qtables);
- }
-
/* Generate a frame and scan headers that can be prepended to the
* RTP/JPEG data payload to produce a JPEG compressed image in
* interchange format. */
jpeg->hdr_size = jpeg_create_header(hdr, sizeof(hdr), type, width,
height, qtables,
- qtable_len > 64 ? 2 : 1);
+ qtable_len / 64);
/* Copy JPEG header to frame buffer. */
avio_write(jpeg->frame, hdr, jpeg->hdr_size);
if (flags & RTP_FLAG_MARKER) {
/* End of JPEG data packet. */
- PutBitContext pbc;
- uint8_t buf[2];
+ uint8_t buf[2] = { 0xff, EOI };
/* Put EOI marker. */
- init_put_bits(&pbc, buf, sizeof(buf));
- put_marker(&pbc, EOI);
- flush_put_bits(&pbc);
avio_write(jpeg->frame, buf, sizeof(buf));
/* Prepare the JPEG packet. */
- av_init_packet(pkt);
- pkt->size = avio_close_dyn_buf(jpeg->frame, &pkt->data);
- if (pkt->size < 0) {
+ if ((ret = ff_rtp_finalize_packet(pkt, &jpeg->frame, st->index)) < 0) {
av_log(ctx, AV_LOG_ERROR,
- "Error occured when getting frame buffer.\n");
- jpeg->frame = NULL;
- return pkt->size;
+ "Error occurred when getting frame buffer.\n");
+ return ret;
}
- pkt->stream_index = st->index;
- pkt->destruct = av_destruct_packet;
-
- /* Re-init the frame buffer. */
- jpeg->frame = NULL;
return 0;
}
projects / ffmpeg / blobdiff