static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
{
int size;
uint8_t *ptr;
if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
/* JFIF header */
put_marker(p, APP0);
put_bits(p, 16, 16);
avpriv_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
/* The most significant byte is used for major revisions, the least
* significant byte for minor revisions. Version 1.02 is the current
* released revision. */
put_bits(p, 16, 0x0102);
put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
put_bits(p, 16, avctx->sample_aspect_ratio.num);
put_bits(p, 16, avctx->sample_aspect_ratio.den);
put_bits(p, 8, 0); /* thumbnail width */
put_bits(p, 8, 0); /* thumbnail height */
}
/* comment */
if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
avpriv_put_string(p, LIBAVCODEC_IDENT, 1);
size = strlen(LIBAVCODEC_IDENT)+3;
AV_WB16(ptr, size);
}
if (((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P) && avctx->color_range != AVCOL_RANGE_JPEG)
|| avctx->color_range == AVCOL_RANGE_MPEG) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
avpriv_put_string(p, "CS=ITU601", 1);
size = strlen("CS=ITU601")+3;
AV_WB16(ptr, size);
}
}
static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
{
int size;
uint8_t *ptr;
if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
/* JFIF header */
put_marker(p, APP0);
put_bits(p, 16, 16);
avpriv_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
put_bits(p, 16, 0x0102); /* v 1.02 */
put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
put_bits(p, 16, avctx->sample_aspect_ratio.num);
put_bits(p, 16, avctx->sample_aspect_ratio.den);
put_bits(p, 8, 0); /* thumbnail width */
put_bits(p, 8, 0); /* thumbnail height */
}
/* comment */
if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
avpriv_put_string(p, LIBAVCODEC_IDENT, 1);
size = strlen(LIBAVCODEC_IDENT)+3;
AV_WB16(ptr, size);
}
if (avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
avpriv_put_string(p, "CS=ITU601", 1);
size = strlen("CS=ITU601")+3;
AV_WB16(ptr, size);
}
}
static int jpeg_create_header(uint8_t *buf, int size, uint32_t type, uint32_t w,
uint32_t h, const uint8_t *qtable, int nb_qtable)
{
PutBitContext pbc;
init_put_bits(&pbc, buf, size);
/* Convert from blocks to pixels. */
w <<= 3;
h <<= 3;
/* SOI */
put_marker(&pbc, SOI);
/* JFIF header */
put_marker(&pbc, APP0);
put_bits(&pbc, 16, 16);
avpriv_put_string(&pbc, "JFIF", 1);
put_bits(&pbc, 16, 0x0201);
put_bits(&pbc, 8, 0);
put_bits(&pbc, 16, 1);
put_bits(&pbc, 16, 1);
put_bits(&pbc, 8, 0);
put_bits(&pbc, 8, 0);
/* DQT */
put_marker(&pbc, DQT);
if (nb_qtable == 2) {
put_bits(&pbc, 16, 2 + 2 * (1 + 64));
} else {
put_bits(&pbc, 16, 2 + 1 * (1 + 64));
}
put_bits(&pbc, 8, 0);
/* Each table is an array of 64 values given in zig-zag
* order, identical to the format used in a JFIF DQT
* marker segment. */
avpriv_copy_bits(&pbc, qtable, 64 * 8);
if (nb_qtable == 2) {
put_bits(&pbc, 8, 1);
avpriv_copy_bits(&pbc, qtable + 64, 64 * 8);
}
/* DHT */
put_marker(&pbc, DHT);
jpeg_create_huffman_table(&pbc, 0, 0, avpriv_mjpeg_bits_dc_luminance,
avpriv_mjpeg_val_dc);
jpeg_create_huffman_table(&pbc, 0, 1, avpriv_mjpeg_bits_dc_chrominance,
avpriv_mjpeg_val_dc);
jpeg_create_huffman_table(&pbc, 1, 0, avpriv_mjpeg_bits_ac_luminance,
avpriv_mjpeg_val_ac_luminance);
jpeg_create_huffman_table(&pbc, 1, 1, avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance);
/* SOF0 */
put_marker(&pbc, SOF0);
put_bits(&pbc, 16, 17);
put_bits(&pbc, 8, 8);
put_bits(&pbc, 8, h >> 8);
put_bits(&pbc, 8, h);
put_bits(&pbc, 8, w >> 8);
put_bits(&pbc, 8, w);
put_bits(&pbc, 8, 3);
put_bits(&pbc, 8, 1);
put_bits(&pbc, 8, type ? 34 : 33);
put_bits(&pbc, 8, 0);
put_bits(&pbc, 8, 2);
put_bits(&pbc, 8, 17);
put_bits(&pbc, 8, nb_qtable == 2 ? 1 : 0);
put_bits(&pbc, 8, 3);
put_bits(&pbc, 8, 17);
put_bits(&pbc, 8, nb_qtable == 2 ? 1 : 0);
/* SOS */
put_marker(&pbc, SOS);
put_bits(&pbc, 16, 12);
put_bits(&pbc, 8, 3);
put_bits(&pbc, 8, 1);
put_bits(&pbc, 8, 0);
put_bits(&pbc, 8, 2);
put_bits(&pbc, 8, 17);
put_bits(&pbc, 8, 3);
put_bits(&pbc, 8, 17);
put_bits(&pbc, 8, 0);
put_bits(&pbc, 8, 63);
put_bits(&pbc, 8, 0);
/* Fill the buffer. */
flush_put_bits(&pbc);
/* Return the length in bytes of the JPEG header. */
return put_bits_count(&pbc) / 8;
}
