Changeset 3880 for pjproject/branches/1.x

Timestamp:

Nov 2, 2011 7:50:44 AM (12 years ago)

Author:

nanang

Message:

Fix #1413: Fix G722.1 encoder to handle multiple frames per packet.

File:

• pjproject/branches/1.x/pjmedia/src/pjmedia-codec/g7221.c (modified) (2 diffs)

pjproject/branches/1.x/pjmedia/src/pjmedia-codec/g7221.c

@@ -749 +749 @@
 {
     codec_private_t *codec_data = (codec_private_t*) codec->codec_data;
-    const Word16 *pcm_input;
-    Word16 mlt_coefs[MAX_SAMPLES_PER_FRAME];
-    Word16 mag_shift;
+    unsigned nsamples, processed;
 
     /* Check frame in & out size */
-    PJ_ASSERT_RETURN((pj_uint16_t)input->size == 
-                     (codec_data->samples_per_frame<<1),
-                     PJMEDIA_CODEC_EPCMTOOSHORT);
-    PJ_ASSERT_RETURN(output_buf_len >= codec_data->frame_size,
+    nsamples = input->size >> 1;
+    PJ_ASSERT_RETURN(nsamples % codec_data->samples_per_frame == 0, 
+                     PJMEDIA_CODEC_EPCMFRMINLEN);
+    PJ_ASSERT_RETURN(output_buf_len >= codec_data->frame_size * nsamples /
+                     codec_data->samples_per_frame,
                      PJMEDIA_CODEC_EFRMTOOSHORT);
 
@@ -789 +788 @@
     }
 
-    /* Encoder adjust the input signal level */
-    if (codec_data->pcm_shift) {
-        unsigned i;
-        pcm_input = (const Word16*)input->buf;
-        for (i=0; i<codec_data->samples_per_frame; ++i) {
-            codec_data->enc_frame[i] = 
-                (pj_int16_t)(pcm_input[i] >> codec_data->pcm_shift);
+    processed = 0;
+    output->size = 0;
+    while (processed < nsamples) {
+        Word16 mlt_coefs[MAX_SAMPLES_PER_FRAME];
+        Word16 mag_shift;
+        const Word16 *pcm_input;
+        pj_int8_t *out_bits;
+        
+        pcm_input = (const Word16*)input->buf + processed;
+        out_bits = (pj_int8_t*)output->buf + output->size;
+
+        /* Encoder adjust the input signal level */
+        if (codec_data->pcm_shift) {
+            unsigned i;
+            for (i=0; i<codec_data->samples_per_frame; ++i) {
+                codec_data->enc_frame[i] = 
+                        (Word16)(pcm_input[i] >> codec_data->pcm_shift);
+            }
+            pcm_input = codec_data->enc_frame;
         }
-        pcm_input = codec_data->enc_frame;
-    } else {
-        pcm_input = (const Word16*)input->buf;
-    }
-
-    /* Convert input samples to rmlt coefs */
-    mag_shift = samples_to_rmlt_coefs(pcm_input,
-                                      codec_data->enc_old_frame, 
-                                      mlt_coefs, 
-                                      codec_data->samples_per_frame);
-
-    /* Encode the mlt coefs. Note that encoder output stream is 16 bit array,
-     * so we need to take care about endianness.
-     */
-    encoder(codec_data->frame_size_bits,
-            codec_data->number_of_regions,
-            mlt_coefs,
-            mag_shift,
-            output->buf);
-
-    /* Encoder output are in native host byte order, while ITU says
-     * it must be in network byte order (MSB first).
-     */
-    swap_bytes((pj_uint16_t*)output->buf, codec_data->frame_size/2);
+
+        /* Convert input samples to rmlt coefs */
+        mag_shift = samples_to_rmlt_coefs(pcm_input,
+                                          codec_data->enc_old_frame, 
+                                          mlt_coefs, 
+                                          codec_data->samples_per_frame);
+
+        /* Encode the mlt coefs. Note that encoder output stream is
+         * 16 bit array, so we need to take care about endianness.
+         */
+        encoder(codec_data->frame_size_bits,
+                codec_data->number_of_regions,
+                mlt_coefs,
+                mag_shift,
+                (Word16*)out_bits);
+
+        /* Encoder output are in native host byte order, while ITU says
+         * it must be in network byte order (MSB first).
+         */
+        swap_bytes((pj_uint16_t*)out_bits, codec_data->frame_size/2);
+
+        processed += codec_data->samples_per_frame;
+        output->size += codec_data->frame_size;
+    }
 
     output->type = PJMEDIA_FRAME_TYPE_AUDIO;
-    output->size = codec_data->frame_size;
     output->timestamp = input->timestamp;