*/
#include "avformat.h"
+#include "avio_internal.h"
+#include "rtpdec.h"
#include "rtpdec_formats.h"
#include "libavutil/intreadwrite.h"
+#include "libavcodec/jpegtables.h"
#include "libavcodec/mjpeg.h"
+#include "libavcodec/bytestream.h"
/**
* RTP/JPEG specific private data.
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 PayloadContext *jpeg_new_context(void)
-{
- return av_mallocz(sizeof(PayloadContext));
-}
-
-static inline void free_frame_if_needed(PayloadContext *jpeg)
-{
- if (jpeg->frame) {
- uint8_t *p;
- avio_close_dyn_buf(jpeg->frame, &p);
- av_free(p);
- jpeg->frame = NULL;
- }
-}
+static const uint8_t default_quantizers[128] = {
+ /* luma table */
+ 16, 11, 12, 14, 12, 10, 16, 14,
+ 13, 14, 18, 17, 16, 19, 24, 40,
+ 26, 24, 22, 22, 24, 49, 35, 37,
+ 29, 40, 58, 51, 61, 60, 57, 51,
+ 56, 55, 64, 72, 92, 78, 64, 68,
+ 87, 69, 55, 56, 80, 109, 81, 87,
+ 95, 98, 103, 104, 103, 62, 77, 113,
+ 121, 112, 100, 120, 92, 101, 103, 99,
+
+ /* chroma table */
+ 17, 18, 18, 24, 21, 24, 47, 26,
+ 26, 47, 99, 66, 56, 66, 99, 99,
+ 99, 99, 99, 99, 99, 99, 99, 99,
+ 99, 99, 99, 99, 99, 99, 99, 99,
+ 99, 99, 99, 99, 99, 99, 99, 99,
+ 99, 99, 99, 99, 99, 99, 99, 99,
+ 99, 99, 99, 99, 99, 99, 99, 99,
+ 99, 99, 99, 99, 99, 99, 99, 99
+};
-static void jpeg_free_context(PayloadContext *jpeg)
+static void jpeg_close_context(PayloadContext *jpeg)
{
- free_frame_if_needed(jpeg);
- av_free(jpeg);
+ ffio_free_dyn_buf(&jpeg->frame);
}
-static void jpeg_create_huffman_table(PutBitContext *p, int table_class,
- int table_id, const uint8_t *bits_table,
- const uint8_t *value_table)
+static int jpeg_create_huffman_table(PutByteContext *p, int table_class,
+ int table_id, const uint8_t *bits_table,
+ const uint8_t *value_table)
{
int i, n = 0;
- put_bits(p, 8, 0);
- put_bits(p, 4, table_class);
- put_bits(p, 4, table_id);
+ bytestream2_put_byte(p, table_class << 4 | table_id);
for (i = 1; i <= 16; i++) {
n += bits_table[i];
- put_bits(p, 8, bits_table[i]);
+ bytestream2_put_byte(p, bits_table[i]);
}
for (i = 0; i < n; i++) {
- put_bits(p, 8, value_table[i]);
+ bytestream2_put_byte(p, value_table[i]);
}
+ return n + 17;
+}
+
+static void jpeg_put_marker(PutByteContext *pbc, int code)
+{
+ bytestream2_put_byte(pbc, 0xff);
+ bytestream2_put_byte(pbc, code);
}
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;
+ PutByteContext pbc;
+ uint8_t *dht_size_ptr;
+ int dht_size, i;
- init_put_bits(&pbc, buf, size);
+ bytestream2_init_writer(&pbc, buf, size);
/* Convert from blocks to pixels. */
w <<= 3;
h <<= 3;
/* SOI */
- put_marker(&pbc, SOI);
+ jpeg_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);
+ jpeg_put_marker(&pbc, APP0);
+ bytestream2_put_be16(&pbc, 16);
+ bytestream2_put_buffer(&pbc, "JFIF", 5);
+ bytestream2_put_be16(&pbc, 0x0201);
+ bytestream2_put_byte(&pbc, 0);
+ bytestream2_put_be16(&pbc, 1);
+ bytestream2_put_be16(&pbc, 1);
+ bytestream2_put_byte(&pbc, 0);
+ bytestream2_put_byte(&pbc, 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);
+ jpeg_put_marker(&pbc, DQT);
+ bytestream2_put_be16(&pbc, 2 + nb_qtable * (1 + 64));
- /* 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);
+ for (i = 0; i < nb_qtable; i++) {
+ bytestream2_put_byte(&pbc, i);
- if (nb_qtable == 2) {
- put_bits(&pbc, 8, 1);
- avpriv_copy_bits(&pbc, qtable + 64, 64 * 8);
+ /* Each table is an array of 64 values given in zig-zag
+ * order, identical to the format used in a JFIF DQT
+ * marker segment. */
+ bytestream2_put_buffer(&pbc, qtable + 64 * i, 64);
}
/* 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);
+ jpeg_put_marker(&pbc, DHT);
+ dht_size_ptr = pbc.buffer;
+ bytestream2_put_be16(&pbc, 0);
+
+ dht_size = 2;
+ dht_size += jpeg_create_huffman_table(&pbc, 0, 0,avpriv_mjpeg_bits_dc_luminance,
+ avpriv_mjpeg_val_dc);
+ dht_size += jpeg_create_huffman_table(&pbc, 0, 1, avpriv_mjpeg_bits_dc_chrominance,
+ avpriv_mjpeg_val_dc);
+ dht_size += jpeg_create_huffman_table(&pbc, 1, 0, avpriv_mjpeg_bits_ac_luminance,
+ avpriv_mjpeg_val_ac_luminance);
+ dht_size += jpeg_create_huffman_table(&pbc, 1, 1, avpriv_mjpeg_bits_ac_chrominance,
+ avpriv_mjpeg_val_ac_chrominance);
+ AV_WB16(dht_size_ptr, dht_size);
/* 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);
+ jpeg_put_marker(&pbc, SOF0);
+ 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); /* 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 */
- 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);
+ jpeg_put_marker(&pbc, SOS);
+ bytestream2_put_be16(&pbc, 12);
+ bytestream2_put_byte(&pbc, 3);
+ bytestream2_put_byte(&pbc, 1);
+ bytestream2_put_byte(&pbc, 0);
+ bytestream2_put_byte(&pbc, 2);
+ bytestream2_put_byte(&pbc, 17);
+ bytestream2_put_byte(&pbc, 3);
+ bytestream2_put_byte(&pbc, 17);
+ bytestream2_put_byte(&pbc, 0);
+ bytestream2_put_byte(&pbc, 63);
+ bytestream2_put_byte(&pbc, 0);
/* Return the length in bytes of the JPEG header. */
- return put_bits_count(&pbc) / 8;
+ return bytestream2_tell_p(&pbc);
+}
+
+static void create_default_qtables(uint8_t *qtables, uint8_t q)
+{
+ int factor = q;
+ int i;
+ uint16_t S;
+
+ factor = av_clip(q, 1, 99);
+
+ if (q < 50)
+ S = 5000 / factor;
+ else
+ S = 200 - factor * 2;
+
+ for (i = 0; i < 128; i++) {
+ int val = (default_quantizers[i] * S + 50) / 100;
+
+ /* Limit the quantizers to 1 <= q <= 255. */
+ val = av_clip(val, 1, 255);
+ qtables[i] = val;
+ }
}
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;
buf += 8;
len -= 8;
- /* Parse the restart marker header. */
- if (type > 63) {
- av_log(ctx, AV_LOG_ERROR,
- "Unimplemented RTP/JPEG restart marker header.\n");
+ 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 (q > 127 && off == 0) {
- uint8_t precision;
-
- if (len < 4) {
- av_log(ctx, AV_LOG_ERROR, "Too short RTP/JPEG packet.\n");
- return AVERROR_INVALIDDATA;
- }
-
- /* The first byte is reserved for future use. */
- precision = AV_RB8(buf + 1); /* size of coefficients */
- qtable_len = AV_RB16(buf + 2); /* length in bytes */
- buf += 4;
- len -= 4;
-
- 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 (off == 0) {
+ /* Start of JPEG data packet. */
+ uint8_t new_qtables[128];
+ uint8_t hdr[1024];
- if (qtable_len > 0) {
- if (len < qtable_len) {
+ if (q > 127) {
+ uint8_t precision;
+ if (len < 4) {
av_log(ctx, AV_LOG_ERROR, "Too short RTP/JPEG packet.\n");
return AVERROR_INVALIDDATA;
}
- qtables = buf;
- buf += qtable_len;
- len -= qtable_len;
- }
- }
- if (off == 0) {
- /* Start of JPEG data packet. */
- uint8_t hdr[1024];
+ /* The first byte is reserved for future use. */
+ precision = AV_RB8(buf + 1); /* size of coefficients */
+ qtable_len = AV_RB16(buf + 2); /* length in bytes */
+ buf += 4;
+ len -= 4;
+
+ if (precision)
+ av_log(ctx, AV_LOG_WARNING, "Only 8-bit precision is supported.\n");
+
+ if (qtable_len > 0) {
+ if (len < qtable_len) {
+ av_log(ctx, AV_LOG_ERROR, "Too short RTP/JPEG packet.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ 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
* has been lost somewhere. */
- free_frame_if_needed(jpeg);
+ ffio_free_dyn_buf(&jpeg->frame);
if ((ret = avio_open_dyn_buf(&jpeg->frame)) < 0)
return ret;
jpeg->timestamp = *timestamp;
- if (!qtables) {
- av_log(ctx, AV_LOG_ERROR,
- "Unimplemented default quantization tables.\n");
- return AVERROR_PATCHWELCOME;
- }
-
/* 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 (jpeg->timestamp != *timestamp) {
/* Skip the current frame if timestamp is incorrect.
* A start packet has been lost somewhere. */
- free_frame_if_needed(jpeg);
+ ffio_free_dyn_buf(&jpeg->frame);
av_log(ctx, AV_LOG_ERROR, "RTP timestamps don't match.\n");
return AVERROR_INVALIDDATA;
}
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;
}
.enc_name = "JPEG",
.codec_type = AVMEDIA_TYPE_VIDEO,
.codec_id = AV_CODEC_ID_MJPEG,
- .alloc = jpeg_new_context,
- .free = jpeg_free_context,
+ .priv_data_size = sizeof(PayloadContext),
+ .close = jpeg_close_context,
.parse_packet = jpeg_parse_packet,
.static_payload_id = 26,
};
projects / ffmpeg / blobdiff