lavc: add a null bitstream filter

[ffmpeg] / libavcodec / libspeexdec.c

diff --git a/libavcodec/libspeexdec.c b/libavcodec/libspeexdec.c
index 21c9d0542820fc8ef50cfe17ccae0ea492898f92..949a9344c1ce8057947512915a7e5986cbe4f501 100644 (file)
--- a/libavcodec/libspeexdec.c
+++ b/libavcodec/libspeexdec.c
@@ -23,16 +23,15 @@
 #include <speex/speex_stereo.h>
 #include <speex/speex_callbacks.h>
 
-#include "libavutil/audioconvert.h"
+#include "libavutil/channel_layout.h"
 #include "libavutil/common.h"
 #include "avcodec.h"
+#include "internal.h"
 
-typedef struct {
-    AVFrame frame;
+typedef struct LibSpeexContext {
     SpeexBits bits;
     SpeexStereoState stereo;
     void *dec_state;
-    SpeexHeader *header;
     int frame_size;
 } LibSpeexContext;
 
@@ -41,16 +40,20 @@ static av_cold int libspeex_decode_init(AVCodecContext *avctx)
 {
     LibSpeexContext *s = avctx->priv_data;
     const SpeexMode *mode;
+    SpeexHeader *header = NULL;
     int spx_mode;
 
-    if (avctx->extradata_size >= 80)
-        s->header = speex_packet_to_header(avctx->extradata, avctx->extradata_size);
-
     avctx->sample_fmt = AV_SAMPLE_FMT_S16;
-    if (s->header) {
-        avctx->channels    = s->header->nb_channels;
-        s->frame_size      = s->header->frame_size;
-        spx_mode           = s->header->mode;
+    if (avctx->extradata && avctx->extradata_size >= 80) {
+        header = speex_packet_to_header(avctx->extradata,
+                                        avctx->extradata_size);
+        if (!header)
+            av_log(avctx, AV_LOG_WARNING, "Invalid Speex header\n");
+    }
+    if (header) {
+        avctx->channels    = header->nb_channels;
+        spx_mode           = header->mode;
+        speex_header_free(header);
     } else {
         switch (avctx->sample_rate) {
         case 8000:  spx_mode = 0; break;
@@ -71,6 +74,7 @@ static av_cold int libspeex_decode_init(AVCodecContext *avctx)
         return AVERROR_INVALIDDATA;
     }
     avctx->sample_rate = 8000 << spx_mode;
+    s->frame_size      =  160 << spx_mode;
 
     if (avctx->channels < 1 || avctx->channels > 2) {
         /* libspeex can handle mono or stereo if initialized as stereo */
@@ -88,10 +92,6 @@ static av_cold int libspeex_decode_init(AVCodecContext *avctx)
         return -1;
     }
 
-    if (!s->header) {
-        speex_decoder_ctl(s->dec_state, SPEEX_GET_FRAME_SIZE, &s->frame_size);
-    }
-
     if (avctx->channels == 2) {
         SpeexCallback callback;
         callback.callback_id = SPEEX_INBAND_STEREO;
@@ -101,9 +101,6 @@ static av_cold int libspeex_decode_init(AVCodecContext *avctx)
         speex_decoder_ctl(s->dec_state, SPEEX_SET_HANDLER, &callback);
     }
 
-    avcodec_get_frame_defaults(&s->frame);
-    avctx->coded_frame = &s->frame;
-
     return 0;
 }
 
@@ -113,21 +110,24 @@ static int libspeex_decode_frame(AVCodecContext *avctx, void *data,
     uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     LibSpeexContext *s = avctx->priv_data;
+    AVFrame *frame     = data;
     int16_t *output;
     int ret, consumed = 0;
 
     /* get output buffer */
-    s->frame.nb_samples = s->frame_size;
-    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+    frame->nb_samples = s->frame_size;
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
         return ret;
     }
-    output = (int16_t *)s->frame.data[0];
-
-    /* if there is not enough data left for the smallest possible frame,
-       reset the libspeex buffer using the current packet, otherwise ignore
-       the current packet and keep decoding frames from the libspeex buffer. */
-    if (speex_bits_remaining(&s->bits) < 43) {
+    output = (int16_t *)frame->data[0];
+
+    /* if there is not enough data left for the smallest possible frame or the
+       next 5 bits are a terminator code, reset the libspeex buffer using the
+       current packet, otherwise ignore the current packet and keep decoding
+       frames from the libspeex buffer. */
+    if (speex_bits_remaining(&s->bits) < 5 ||
+        speex_bits_peek_unsigned(&s->bits, 5) == 0xF) {
         /* check for flush packet */
         if (!buf || !buf_size) {
             *got_frame_ptr = 0;
@@ -147,8 +147,7 @@ static int libspeex_decode_frame(AVCodecContext *avctx, void *data,
     if (avctx->channels == 2)
         speex_decode_stereo_int(output, s->frame_size, &s->stereo);
 
-    *got_frame_ptr   = 1;
-    *(AVFrame *)data = s->frame;
+    *got_frame_ptr = 1;
 
     return consumed;
 }
@@ -157,7 +156,6 @@ static av_cold int libspeex_decode_close(AVCodecContext *avctx)
 {
     LibSpeexContext *s = avctx->priv_data;
 
-    speex_header_free(s->header);
     speex_bits_destroy(&s->bits);
     speex_decoder_destroy(s->dec_state);
 
@@ -172,6 +170,7 @@ static av_cold void libspeex_decode_flush(AVCodecContext *avctx)
 
 AVCodec ff_libspeex_decoder = {
     .name           = "libspeex",
+    .long_name      = NULL_IF_CONFIG_SMALL("libspeex Speex"),
     .type           = AVMEDIA_TYPE_AUDIO,
     .id             = AV_CODEC_ID_SPEEX,
     .priv_data_size = sizeof(LibSpeexContext),
@@ -179,6 +178,5 @@ AVCodec ff_libspeex_decoder = {
     .close          = libspeex_decode_close,
     .decode         = libspeex_decode_frame,
     .flush          = libspeex_decode_flush,
-    .capabilities   = CODEC_CAP_SUBFRAMES | CODEC_CAP_DELAY | CODEC_CAP_DR1,
-    .long_name      = NULL_IF_CONFIG_SMALL("libspeex Speex"),
+    .capabilities   = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
 };