X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Faacdec.c;h=4bdf52fc66f5a50caf8b560dc3a351163c97031b;hb=67bc1ba5d75953d136bfa02ce6c0a27e9fd9dac3;hp=6a059382819ebfe3c15fa46d6d77c1932be11228;hpb=454959a5aa73b585e2937b948178310c74bfc297;p=ffmpeg

diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 6a059382819..4bdf52fc66f 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -103,6 +103,7 @@
 #include <assert.h>
 #include <errno.h>
 #include <math.h>
+#include <stdint.h>
 #include <string.h>
 
 #if ARCH_ARM
@@ -1064,7 +1065,6 @@ static av_cold int aac_decode_init(AVCodecContext *avctx)
     ff_mdct_init(&ac->mdct_ltp,   11, 0, -2.0 * 32768.0);
     // window initialization
     ff_kbd_window_init(ff_aac_kbd_long_1024, 4.0, 1024);
-    ff_kbd_window_init(ff_aac_kbd_long_512,  4.0, 512);
     ff_kbd_window_init(ff_aac_kbd_short_128, 6.0, 128);
     ff_init_ff_sine_windows(10);
     ff_init_ff_sine_windows( 9);
@@ -1177,13 +1177,14 @@ static int decode_ics_info(AACContext *ac, IndividualChannelStream *ics,
         if (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD) {
             ics->swb_offset        =     ff_swb_offset_512[ac->oc[1].m4ac.sampling_index];
             ics->num_swb           =    ff_aac_num_swb_512[ac->oc[1].m4ac.sampling_index];
+            ics->tns_max_bands     =  ff_tns_max_bands_512[ac->oc[1].m4ac.sampling_index];
             if (!ics->num_swb || !ics->swb_offset)
                 return AVERROR_BUG;
         } else {
             ics->swb_offset        =    ff_swb_offset_1024[ac->oc[1].m4ac.sampling_index];
             ics->num_swb           =   ff_aac_num_swb_1024[ac->oc[1].m4ac.sampling_index];
+            ics->tns_max_bands     = ff_tns_max_bands_1024[ac->oc[1].m4ac.sampling_index];
         }
-        ics->tns_max_bands         = ff_tns_max_bands_1024[ac->oc[1].m4ac.sampling_index];
         if (aot != AOT_ER_AAC_ELD) {
             ics->predictor_present     = get_bits1(gb);
             ics->predictor_reset_group = 0;
@@ -2428,14 +2429,20 @@ static void imdct_and_windowing_ld(AACContext *ac, SingleChannelElement *sce)
     float *in    = sce->coeffs;
     float *out   = sce->ret;
     float *saved = sce->saved;
-    const float *lwindow_prev = ics->use_kb_window[1] ? ff_aac_kbd_long_512 : ff_sine_512;
     float *buf  = ac->buf_mdct;
 
     // imdct
     ac->mdct.imdct_half(&ac->mdct_ld, buf, in);
 
     // window overlapping
-    ac->fdsp.vector_fmul_window(out, saved, buf, lwindow_prev, 256);
+    if (ics->use_kb_window[1]) {
+        // AAC LD uses a low overlap sine window instead of a KBD window
+        memcpy(out, saved, 192 * sizeof(float));
+        ac->fdsp.vector_fmul_window(out + 192, saved + 192, buf, ff_sine_128, 64);
+        memcpy(                     out + 320, buf + 64, 192 * sizeof(float));
+    } else {
+        ac->fdsp.vector_fmul_window(out, saved, buf, ff_sine_512, 256);
+    }
 
     // buffer update
     memcpy(saved, buf + 256, 256 * sizeof(float));
@@ -2522,7 +2529,7 @@ static void apply_dependent_coupling(AACContext *ac,
                 const float gain = cce->coup.gain[index][idx];
                 for (group = 0; group < ics->group_len[g]; group++) {
                     for (k = offsets[i]; k < offsets[i + 1]; k++) {
-                        // XXX dsputil-ize
+                        // FIXME: SIMDify
                         dest[group * 128 + k] += gain * src[group * 128 + k];
                     }
                 }
@@ -2746,6 +2753,7 @@ static int aac_decode_er_frame(AVCodecContext *avctx, void *data,
     spectral_to_sample(ac);
 
     ac->frame->nb_samples = samples;
+    ac->frame->sample_rate = avctx->sample_rate;
     *got_frame_ptr = 1;
 
     skip_bits_long(gb, get_bits_left(gb));
@@ -2878,16 +2886,18 @@ static int aac_decode_frame_int(AVCodecContext *avctx, void *data,
     multiplier = (ac->oc[1].m4ac.sbr == 1) ? ac->oc[1].m4ac.ext_sample_rate > ac->oc[1].m4ac.sample_rate : 0;
     samples <<= multiplier;
 
-    if (samples)
-        ac->frame->nb_samples = samples;
-    *got_frame_ptr = !!samples;
-
     if (ac->oc[1].status && audio_found) {
         avctx->sample_rate = ac->oc[1].m4ac.sample_rate << multiplier;
         avctx->frame_size = samples;
         ac->oc[1].status = OC_LOCKED;
     }
 
+    if (samples) {
+        ac->frame->nb_samples = samples;
+        ac->frame->sample_rate = avctx->sample_rate;
+    }
+    *got_frame_ptr = !!samples;
+
     return 0;
 fail:
     pop_output_configuration(ac);
@@ -3020,7 +3030,8 @@ static int latm_decode_audio_specific_config(struct LATMContext *latmctx,
     if (bits_consumed < 0)
         return AVERROR_INVALIDDATA;
 
-    if (ac->oc[1].m4ac.sample_rate != m4ac.sample_rate ||
+    if (!latmctx->initialized ||
+        ac->oc[1].m4ac.sample_rate != m4ac.sample_rate ||
         ac->oc[1].m4ac.chan_config != m4ac.chan_config) {
 
         av_log(avctx, AV_LOG_INFO, "audio config changed\n");