X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fadtsenc.c;h=1f5453dbaf69bc4543911773252ec819dc9499d2;hb=89e568feeca69b1e4b975d0b26aeafbe72fd5418;hp=9916b92ac6ddf6032b080886dc528e2c1f0861a5;hpb=eca406e2843d3daec4567d902d4309a21598bcb5;p=ffmpeg

diff --git a/libavformat/adtsenc.c b/libavformat/adtsenc.c
index 9916b92ac6d..1f5453dbaf6 100644
--- a/libavformat/adtsenc.c
+++ b/libavformat/adtsenc.c
@@ -20,29 +20,30 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include "libavcodec/bitstream.h"
-#include "libavcodec/internal.h"
+#include "libavcodec/get_bits.h"
+#include "libavcodec/put_bits.h"
+#include "libavcodec/avcodec.h"
+#include "libavcodec/mpeg4audio.h"
 #include "avformat.h"
+#include "adts.h"
 
-#define ADTS_HEADER_SIZE 7
-
-typedef struct {
-    int write_adts;
-    int objecttype;
-    int sample_rate_index;
-    int channel_conf;
-} ADTSContext;
-
-static int decode_extradata(AVFormatContext *s, ADTSContext *adts, uint8_t *buf, int size)
+int ff_adts_decode_extradata(AVFormatContext *s, ADTSContext *adts, uint8_t *buf, int size)
 {
     GetBitContext gb;
+    PutBitContext pb;
+    MPEG4AudioConfig m4ac;
+    int off;
 
     init_get_bits(&gb, buf, size * 8);
-    adts->objecttype = get_bits(&gb, 5) - 1;
-    adts->sample_rate_index = get_bits(&gb, 4);
-    adts->channel_conf = get_bits(&gb, 4);
-
-    if (adts->objecttype > 3) {
+    off = ff_mpeg4audio_get_config(&m4ac, buf, size);
+    if (off < 0)
+        return off;
+    skip_bits_long(&gb, off);
+    adts->objecttype        = m4ac.object_type - 1;
+    adts->sample_rate_index = m4ac.sampling_index;
+    adts->channel_conf      = m4ac.chan_config;
+
+    if (adts->objecttype > 3U) {
         av_log(s, AV_LOG_ERROR, "MPEG-4 AOT %d is not allowed in ADTS\n", adts->objecttype+1);
         return -1;
     }
@@ -50,10 +51,21 @@ static int decode_extradata(AVFormatContext *s, ADTSContext *adts, uint8_t *buf,
         av_log(s, AV_LOG_ERROR, "Escape sample rate index illegal in ADTS\n");
         return -1;
     }
-    if (adts->channel_conf == 0) {
-        ff_log_missing_feature(s, "PCE based channel configuration", 0);
+    if (get_bits(&gb, 1)) {
+        av_log(s, AV_LOG_ERROR, "960/120 MDCT window is not allowed in ADTS\n");
+        return -1;
+    }
+    if (get_bits(&gb, 1)) {
+        av_log(s, AV_LOG_ERROR, "Scalable configurations are not allowed in ADTS\n");
         return -1;
     }
+    if (!adts->channel_conf) {
+        init_put_bits(&pb, adts->pce_data, MAX_PCE_SIZE);
+
+        put_bits(&pb, 3, 5); //ID_PCE
+        adts->pce_size = (ff_copy_pce_data(&pb, &gb) + 3) / 8;
+        flush_put_bits(&pb);
+    }
 
     adts->write_adts = 1;
 
@@ -65,18 +77,17 @@ static int adts_write_header(AVFormatContext *s)
     ADTSContext *adts = s->priv_data;
     AVCodecContext *avc = s->streams[0]->codec;
 
-    if(avc->extradata_size > 0 &&
-            decode_extradata(s, adts, avc->extradata, avc->extradata_size) < 0)
+    if (avc->extradata_size > 0 &&
+            ff_adts_decode_extradata(s, adts, avc->extradata, avc->extradata_size) < 0)
         return -1;
 
     return 0;
 }
 
-static int adts_write_frame_header(AVFormatContext *s, int size)
+int ff_adts_write_frame_header(ADTSContext *ctx,
+                               uint8_t *buf, int size, int pce_size)
 {
-    ADTSContext *ctx = s->priv_data;
     PutBitContext pb;
-    uint8_t buf[ADTS_HEADER_SIZE];
 
     init_put_bits(&pb, buf, ADTS_HEADER_SIZE);
 
@@ -95,12 +106,11 @@ static int adts_write_frame_header(AVFormatContext *s, int size)
     /* adts_variable_header */
     put_bits(&pb, 1, 0);        /* copyright_identification_bit */
     put_bits(&pb, 1, 0);        /* copyright_identification_start */
-    put_bits(&pb, 13, ADTS_HEADER_SIZE + size); /* aac_frame_length */
+    put_bits(&pb, 13, ADTS_HEADER_SIZE + size + pce_size); /* aac_frame_length */
     put_bits(&pb, 11, 0x7ff);   /* adts_buffer_fullness */
     put_bits(&pb, 2, 0);        /* number_of_raw_data_blocks_in_frame */
 
     flush_put_bits(&pb);
-    put_buffer(s->pb, buf, ADTS_HEADER_SIZE);
 
     return 0;
 }
@@ -108,23 +118,30 @@ static int adts_write_frame_header(AVFormatContext *s, int size)
 static int adts_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     ADTSContext *adts = s->priv_data;
-    ByteIOContext *pb = s->pb;
+    AVIOContext *pb = s->pb;
+    uint8_t buf[ADTS_HEADER_SIZE];
 
     if (!pkt->size)
         return 0;
-    if(adts->write_adts)
-        adts_write_frame_header(s, pkt->size);
-    put_buffer(pb, pkt->data, pkt->size);
+    if (adts->write_adts) {
+        ff_adts_write_frame_header(adts, buf, pkt->size, adts->pce_size);
+        avio_write(pb, buf, ADTS_HEADER_SIZE);
+        if (adts->pce_size) {
+            avio_write(pb, adts->pce_data, adts->pce_size);
+            adts->pce_size = 0;
+        }
+    }
+    avio_write(pb, pkt->data, pkt->size);
     put_flush_packet(pb);
 
     return 0;
 }
 
-AVOutputFormat adts_muxer = {
+AVOutputFormat ff_adts_muxer = {
     "adts",
     NULL_IF_CONFIG_SMALL("ADTS AAC"),
     "audio/aac",
-    "aac",
+    "aac,adts",
     sizeof(ADTSContext),
     CODEC_ID_AAC,
     CODEC_ID_NONE,