From 001a338e5126cbec422867481ef7485b1b3c8eea Mon Sep 17 00:00:00 2001
From: "roman.artiukhin" <bahusdrive@gmail.com>
Date: Mon, 18 Sep 2023 13:14:47 +0300
Subject: Codecs: mp4: Reuse lookup_table index from seek in
 m4a_check_sample_offset

Change-Id: If2fc3038ce8db8ddf2991406a5cce294a857eadc
---
 lib/rbcodec/codecs/aac.c        | 5 ++---
 lib/rbcodec/codecs/alac.c       | 7 ++++---
 lib/rbcodec/codecs/libm4a/m4a.c | 6 ++++--
 lib/rbcodec/codecs/libm4a/m4a.h | 4 ++--
 4 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/lib/rbcodec/codecs/aac.c b/lib/rbcodec/codecs/aac.c
index 0a4313e69e..11a84cfa24 100644
--- a/lib/rbcodec/codecs/aac.c
+++ b/lib/rbcodec/codecs/aac.c
@@ -138,7 +138,7 @@ enum codec_status codec_run(void)
          * upsampling files the resulting sound_samples_done must be expanded
          * by a factor of 2. This is done via using sbr_fac. */
         if (m4a_seek_raw(&demux_res, &input_stream, file_offset,
-                          &sound_samples_done, (int*) &i)) {
+                          &sound_samples_done, (int*) &i, &seek_idx)) {
             sound_samples_done *= sbr_fac;
         } else {
             sound_samples_done = 0;
@@ -173,11 +173,10 @@ enum codec_status codec_run(void)
              * by a factor 2. This is done via using sbr_fac. */
             if (m4a_seek(&demux_res, &input_stream,
                          (uint64_t) param * ci->id3->frequency / sbr_fac / 1000ULL,
-                          &sound_samples_done, (int*) &i)) {
+                          &sound_samples_done, (int*) &i, &seek_idx)) {
                 sound_samples_done *= sbr_fac;
                 elapsed_time = sound_samples_done * 1000LL / ci->id3->frequency;
                 ci->set_elapsed(elapsed_time);
-                seek_idx = 0;
 
                 if (i == 0) 
                 {
diff --git a/lib/rbcodec/codecs/alac.c b/lib/rbcodec/codecs/alac.c
index 141c5d6f91..7139b629b8 100644
--- a/lib/rbcodec/codecs/alac.c
+++ b/lib/rbcodec/codecs/alac.c
@@ -64,6 +64,7 @@ enum codec_status codec_run(void)
     unsigned long resume_time;
     uint32_t resume_offset;
     unsigned int did_resume;
+    int lookup_table_idx = 0;
 
     /* Clean and initialize decoder structures */
     memset(&demux_res , 0, sizeof(demux_res));
@@ -96,10 +97,10 @@ enum codec_status codec_run(void)
     if (resume_time)
         did_resume = m4a_seek(&demux_res, &input_stream,
                               (uint64_t)resume_time * ci->id3->frequency / 1000ULL,
-                              &samplesdone, (int *) &i);
+                              &samplesdone, (int *) &i, &lookup_table_idx);
     else if (resume_offset)
         did_resume = m4a_seek_raw(&demux_res, &input_stream, resume_offset,
-                                  &samplesdone, (int *) &i);
+                                  &samplesdone, (int *) &i, &lookup_table_idx);
     else
         did_resume = 0;
 
@@ -122,7 +123,7 @@ enum codec_status codec_run(void)
         if (action == CODEC_ACTION_SEEK_TIME) {
             if (m4a_seek(&demux_res, &input_stream,
                          (uint64_t)param * ci->id3->frequency / 1000ULL,
-                         &samplesdone, (int *) &i))
+                         &samplesdone, (int *) &i, &lookup_table_idx))
                 set_elapsed_samples(samplesdone);
 
             ci->seek_complete();
diff --git a/lib/rbcodec/codecs/libm4a/m4a.c b/lib/rbcodec/codecs/libm4a/m4a.c
index 958d0b1575..6adc58dab0 100644
--- a/lib/rbcodec/codecs/libm4a/m4a.c
+++ b/lib/rbcodec/codecs/libm4a/m4a.c
@@ -141,7 +141,7 @@ int m4a_check_sample_offset(demux_res_t *demux_res, uint32_t frame, uint32_t *st
  * sound_samples_done and current_sample), 0 if failed. */
 unsigned int m4a_seek(demux_res_t* demux_res, stream_t* stream, 
     uint64_t sound_sample_loc, uint64_t* sound_samples_done, 
-    int* current_sample)
+    int* current_sample, int* lookup_table_idx)
 {
     uint32_t i, sample_i;
     uint32_t time, time_cnt, time_dur;
@@ -189,6 +189,7 @@ unsigned int m4a_seek(demux_res_t* demux_res, stream_t* stream,
 
     /* The preceding chunk is the one that contains 'sample_i'. */
     chunk--;
+    *lookup_table_idx = chunk;
     chunk_first_sample = tco_tab[chunk].sample;
     offset = tco_tab[chunk].offset;
 
@@ -265,7 +266,7 @@ unsigned int m4a_seek(demux_res_t* demux_res, stream_t* stream,
  */
 unsigned int m4a_seek_raw(demux_res_t* demux_res, stream_t* stream,
     uint32_t file_loc, uint64_t* sound_samples_done, 
-    int* current_sample)
+    int* current_sample, int* lookup_table_idx)
 {
     uint32_t i;
     uint32_t chunk_sample     = 0;
@@ -283,6 +284,7 @@ unsigned int m4a_seek_raw(demux_res_t* demux_res, stream_t* stream,
             break;
     }
     i = (i>0) ? i-1 : 0; /* We want the last chunk _before_ file_loc. */
+    *lookup_table_idx = i;
     chunk_sample = demux_res->lookup_table[i].sample;
     new_pos      = demux_res->lookup_table[i].offset;
     
diff --git a/lib/rbcodec/codecs/libm4a/m4a.h b/lib/rbcodec/codecs/libm4a/m4a.h
index 475773834c..bcc32f53bb 100644
--- a/lib/rbcodec/codecs/libm4a/m4a.h
+++ b/lib/rbcodec/codecs/libm4a/m4a.h
@@ -131,9 +131,9 @@ void stream_create(stream_t *stream,struct codec_api* ci);
 unsigned int get_sample_offset(demux_res_t *demux_res, uint32_t sample);
 unsigned int m4a_seek (demux_res_t* demux_res, stream_t* stream,
     uint64_t sound_sample_loc, uint64_t* sound_samples_done, 
-    int* current_sample);
+    int* current_sample, int* lookup_table_idx);
 unsigned int m4a_seek_raw (demux_res_t* demux_res, stream_t* stream,
-    uint32_t file_loc, uint64_t* sound_samples_done, int* current_sample);
+    uint32_t file_loc, uint64_t* sound_samples_done, int* current_sample, int* lookup_table_idx);
 int m4a_check_sample_offset(demux_res_t *demux_res, uint32_t frame, uint32_t *start);
 
 #endif /* STREAM_H */
-- 
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