avformat/iamf_writer: constify some variables

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 11 insertions, 10 deletions

diff --git a/libavformat/iamf_writer.c b/libavformat/iamf_writer.c
index 8a903a0397..37ec8e732a 100644
--- a/libavformat/iamf_writer.c
+++ b/libavformat/iamf_writer.c
@@ -277,7 +277,7 @@ int ff_iamf_add_audio_element(IAMFContext *iamf, const AVStreamGroup *stg, void
 
     if (iamf_audio_element->demixing_info) {
         AVIAMFParamDefinition *param = iamf_audio_element->demixing_info;
-        IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id);
+        const IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id);
 
         if (param->nb_subblocks != 1) {
             av_log(log_ctx, AV_LOG_ERROR, "nb_subblocks in demixing_info for stream group %u is not 1\n", stg->index);
@@ -293,7 +293,7 @@ int ff_iamf_add_audio_element(IAMFContext *iamf, const AVStreamGroup *stg, void
     }
     if (iamf_audio_element->recon_gain_info) {
         AVIAMFParamDefinition *param = iamf_audio_element->recon_gain_info;
-        IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id);
+        const IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id);
 
         if (param->nb_subblocks != 1) {
             av_log(log_ctx, AV_LOG_ERROR, "nb_subblocks in recon_gain_info for stream group %u is not 1\n", stg->index);
@@ -495,7 +495,7 @@ static int scalable_channel_layout_config(const IAMFAudioElement *audio_element,
     flush_put_bits(&pb);
     avio_write(dyn_bc, header, put_bytes_count(&pb, 1));
     for (int i = 0; i < element->nb_layers; i++) {
-        AVIAMFLayer *layer = element->layers[i];
+        const AVIAMFLayer *layer = element->layers[i];
         int layout;
         for (layout = 0; layout < FF_ARRAY_ELEMS(ff_iamf_scalable_ch_layouts); layout++) {
             if (!av_channel_layout_compare(&layer->ch_layout, &ff_iamf_scalable_ch_layouts[layout]))
@@ -524,7 +524,7 @@ static int ambisonics_config(const IAMFAudioElement *audio_element,
                              AVIOContext *dyn_bc)
 {
     const AVIAMFAudioElement *element = audio_element->celement;
-    AVIAMFLayer *layer = element->layers[0];
+    const AVIAMFLayer *layer = element->layers[0];
 
     ffio_write_leb(dyn_bc, 0); // ambisonics_mode
     ffio_write_leb(dyn_bc, layer->ch_layout.nb_channels); // output_channel_count
@@ -857,7 +857,7 @@ static int write_parameter_block(const IAMFContext *iamf, AVIOContext *pb,
                                  const AVIAMFParamDefinition *param, void *log_ctx)
 {
     uint8_t header[MAX_IAMF_OBU_HEADER_SIZE];
-    IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id);
+    const IAMFParamDefinition *param_definition = ff_iamf_get_param_definition(iamf, param->parameter_id);
     PutBitContext pbc;
     AVIOContext *dyn_bc;
     uint8_t *dyn_buf = NULL;
@@ -1034,7 +1034,8 @@ int ff_iamf_write_audio_frame(const IAMFContext *iamf, AVIOContext *pb,
     uint8_t header[MAX_IAMF_OBU_HEADER_SIZE];
     PutBitContext pbc;
     AVIOContext *dyn_bc;
-    uint8_t *side_data, *dyn_buf = NULL;
+    const uint8_t *side_data;
+    uint8_t *dyn_buf = NULL;
     unsigned int skip_samples = 0, discard_padding = 0;
     size_t side_data_size;
     int dyn_size, type = audio_substream_id <= 17 ?
@@ -1042,12 +1043,12 @@ int ff_iamf_write_audio_frame(const IAMFContext *iamf, AVIOContext *pb,
     int ret;
 
     if (!pkt->size) {
-        IAMFAudioElement *audio_element;
+        const IAMFAudioElement *audio_element;
         IAMFCodecConfig *codec_config;
         size_t new_extradata_size;
-        uint8_t *new_extradata = av_packet_get_side_data(pkt,
-                                                         AV_PKT_DATA_NEW_EXTRADATA,
-                                                         &new_extradata_size);
+        const uint8_t *new_extradata = av_packet_get_side_data(pkt,
+                                                               AV_PKT_DATA_NEW_EXTRADATA,
+                                                               &new_extradata_size);
 
         if (!new_extradata)
             return AVERROR_INVALIDDATA;