1 files changed, 37 insertions, 16 deletions

diff --git a/libavcodec/g726.c b/libavcodec/g726.c
index e783e74c90..ca7f856eac 100644
--- a/libavcodec/g726.c
+++ b/libavcodec/g726.c
@@ -5,20 +5,20 @@
  * This is a very straightforward rendition of the G.726
  * Section 4 "Computational Details".
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include <limits.h>
@@ -95,6 +95,7 @@ typedef struct G726Context {
     int sez;            /**< estimated second order prediction */
     int y;              /**< quantizer scaling factor for the next iteration */
     int code_size;
+    int little_endian;  /**< little-endian bitstream as used in aiff and Sun AU */
 } G726Context;
 
 static const int quant_tbl16[] =                  /**< 16kbit/s 2 bits per sample */
@@ -205,7 +206,7 @@ static int16_t g726_decode(G726Context* c, int I)
 
     if (I_sig)  /* get the sign */
         dq = -dq;
-    re_signal = c->se + dq;
+    re_signal = (int16_t)(c->se + dq);
 
     /* Update second order predictor coefficient A2 and A1 */
     pk0 = (c->sez + dq) ? sgn(c->sez + dq) : 0;
@@ -296,7 +297,7 @@ static int16_t g726_encode(G726Context* c, int16_t sig)
 {
     uint8_t i;
 
-    i = quant(c, sig/4 - c->se) & ((1<<c->code_size) - 1);
+    i = av_mod_uintp2(quant(c, sig/4 - c->se), c->code_size);
     g726_decode(c, i);
     return i;
 }
@@ -350,10 +351,8 @@ static int g726_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
     int i, ret, out_size;
 
     out_size = (frame->nb_samples * c->code_size + 7) / 8;
-    if ((ret = ff_alloc_packet(avpkt, out_size))) {
-        av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+    if ((ret = ff_alloc_packet2(avctx, avpkt, out_size, 0)) < 0)
         return ret;
-    }
     init_put_bits(&pb, avpkt->data, avpkt->size);
 
     for (i = 0; i < frame->nb_samples; i++)
@@ -373,7 +372,7 @@ static const AVOption options[] = {
     { NULL },
 };
 
-static const AVClass class = {
+static const AVClass g726_class = {
     .class_name = "g726",
     .item_name  = av_default_item_name,
     .option     = options,
@@ -396,19 +395,25 @@ AVCodec ff_adpcm_g726_encoder = {
     .capabilities   = AV_CODEC_CAP_SMALL_LAST_FRAME,
     .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
                                                      AV_SAMPLE_FMT_NONE },
-    .priv_class     = &class,
+    .priv_class     = &g726_class,
     .defaults       = defaults,
 };
 #endif
 
-#if CONFIG_ADPCM_G726_DECODER
+#if CONFIG_ADPCM_G726_DECODER || CONFIG_ADPCM_G726LE_DECODER
 static av_cold int g726_decode_init(AVCodecContext *avctx)
 {
     G726Context* c = avctx->priv_data;
 
+    if(avctx->channels > 1){
+        avpriv_request_sample(avctx, "Decoding more than one channel");
+        return AVERROR_PATCHWELCOME;
+    }
     avctx->channels       = 1;
     avctx->channel_layout = AV_CH_LAYOUT_MONO;
 
+    c->little_endian = !strcmp(avctx->codec->name, "g726le");
+
     c->code_size = avctx->bits_per_coded_sample;
     if (c->code_size < 2 || c->code_size > 5) {
         av_log(avctx, AV_LOG_ERROR, "Invalid number of bits %d\n", c->code_size);
@@ -436,16 +441,16 @@ static int g726_decode_frame(AVCodecContext *avctx, void *data,
 
     /* get output buffer */
     frame->nb_samples = out_samples;
-    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
-        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
         return ret;
-    }
     samples = (int16_t *)frame->data[0];
 
     init_get_bits(&gb, buf, buf_size * 8);
 
     while (out_samples--)
-        *samples++ = g726_decode(c, get_bits(&gb, c->code_size));
+        *samples++ = g726_decode(c, c->little_endian ?
+                                    get_bits_le(&gb, c->code_size) :
+                                    get_bits(&gb, c->code_size));
 
     if (get_bits_left(&gb) > 0)
         av_log(avctx, AV_LOG_ERROR, "Frame invalidly split, missing parser?\n");
@@ -460,7 +465,9 @@ static void g726_decode_flush(AVCodecContext *avctx)
     G726Context *c = avctx->priv_data;
     g726_reset(c);
 }
+#endif
 
+#if CONFIG_ADPCM_G726_DECODER
 AVCodec ff_adpcm_g726_decoder = {
     .name           = "g726",
     .long_name      = NULL_IF_CONFIG_SMALL("G.726 ADPCM"),
@@ -473,3 +480,17 @@ AVCodec ff_adpcm_g726_decoder = {
     .capabilities   = AV_CODEC_CAP_DR1,
 };
 #endif
+
+#if CONFIG_ADPCM_G726LE_DECODER
+AVCodec ff_adpcm_g726le_decoder = {
+    .name           = "g726le",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = AV_CODEC_ID_ADPCM_G726LE,
+    .priv_data_size = sizeof(G726Context),
+    .init           = g726_decode_init,
+    .decode         = g726_decode_frame,
+    .flush          = g726_decode_flush,
+    .capabilities   = AV_CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("G.726 ADPCM little-endian"),
+};
+#endif