mp4: Rename mp4_meta_update() to mp4_update_meta().

[paraslash.git] / mp4.c

diff --git a/mp4.c b/mp4.c
index e4082549113c5bb89a6c765b9ff50f76d765a60f..02294265916745275f52dc1e400fbe6ebcd9e64d 100644 (file)
--- a/mp4.c
+++ b/mp4.c
@@ -212,7 +212,6 @@ static void skip_bytes(struct mp4 *f, off_t num_skip)
 static int read_stsz(struct mp4 *f)
 {
        int ret;
-       int32_t i;
        struct mp4_track *t = &f->track;
 
        if (t->state != ATS_SEEN_MP4A || t->stsz_table)
@@ -227,8 +226,8 @@ static int read_stsz(struct mp4 *f)
        if (t->stsz_sample_size != 0)
                return 1;
        t->stsz_table = para_malloc(t->stsz_sample_count * sizeof(int32_t));
-       for (i = 0; i < t->stsz_sample_count; i++) {
-               ret = read_int32(f, &t->stsz_table[i]);
+       for (uint32_t n = 0; n < t->stsz_sample_count; n++) {
+               ret = read_int32(f, &t->stsz_table[n]);
                if (ret <= 0)
                        return ret;
        }
@@ -238,7 +237,6 @@ static int read_stsz(struct mp4 *f)
 static int read_stts(struct mp4 *f)
 {
        int ret;
-       int32_t i;
        struct mp4_track *t = &f->track;
 
        if (t->state != ATS_SEEN_MP4A || t->stts_sample_count)
@@ -249,8 +247,8 @@ static int read_stts(struct mp4 *f)
                return ret;
        t->stts_sample_count = para_malloc(t->stts_entry_count
                * sizeof(int32_t));
-       for (i = 0; i < t->stts_entry_count; i++) {
-               ret = read_int32(f, &t->stts_sample_count[i]);
+       for (uint32_t n = 0; n < t->stts_entry_count; n++) {
+               ret = read_int32(f, &t->stts_sample_count[n]);
                if (ret <= 0)
                        return ret;
                skip_bytes(f, 4); /* sample delta */
@@ -261,7 +259,6 @@ static int read_stts(struct mp4 *f)
 static int read_stsc(struct mp4 *f)
 {
        int ret;
-       int32_t i;
        struct mp4_track *t = &f->track;
 
        if (t->state != ATS_SEEN_MP4A)
@@ -275,11 +272,11 @@ static int read_stsc(struct mp4 *f)
        t->stsc_first_chunk = para_malloc(t->stsc_entry_count * sizeof(int32_t));
        t->stsc_samples_per_chunk = para_malloc(t->stsc_entry_count
                * sizeof (int32_t));
-       for (i = 0; i < t->stsc_entry_count; i++) {
-               ret = read_int32(f, &t->stsc_first_chunk[i]);
+       for (uint32_t n = 0; n < t->stsc_entry_count; n++) {
+               ret = read_int32(f, &t->stsc_first_chunk[n]);
                if (ret <= 0)
                        return ret;
-               ret = read_int32(f, &t->stsc_samples_per_chunk[i]);
+               ret = read_int32(f, &t->stsc_samples_per_chunk[n]);
                if (ret <= 0)
                        return ret;
                skip_bytes(f, 4); /* sample desc index */
@@ -290,7 +287,6 @@ static int read_stsc(struct mp4 *f)
 static int read_stco(struct mp4 *f)
 {
        int ret;
-       int32_t i;
        struct mp4_track *t = &f->track;
 
        if (t->state != ATS_SEEN_MP4A || t->stco_chunk_offset)
@@ -301,8 +297,8 @@ static int read_stco(struct mp4 *f)
                return ret;
        t->stco_chunk_offset = para_malloc(t->stco_entry_count
                * sizeof(int32_t));
-       for (i = 0; i < t->stco_entry_count; i++) {
-               ret = read_int32(f, &t->stco_chunk_offset[i]);
+       for (uint32_t n = 0; n < t->stco_entry_count; n++) {
+               ret = read_int32(f, &t->stco_chunk_offset[n]);
                if (ret <= 0)
                        return ret;
        }
@@ -312,7 +308,7 @@ static int read_stco(struct mp4 *f)
 static int read_stsd(struct mp4 *f)
 {
        int ret;
-       uint32_t i, entry_count;
+       uint32_t entry_count;
 
        if (f->track.state != ATS_INITIAL)
                return 1;
@@ -320,7 +316,7 @@ static int read_stsd(struct mp4 *f)
        ret = read_int32(f, &entry_count);
        if (ret <= 0)
                return ret;
-       for (i = 0; i < entry_count; i++) {
+       for (uint32_t n = 0; n < entry_count; n++) {
                uint64_t skip = get_position(f);
                uint64_t size;
                uint8_t atom_type = 0;
@@ -398,7 +394,6 @@ static int parse_tag(struct mp4 *f, uint8_t parent, int32_t size)
        tag = f->meta.tags + f->meta.count;
        tag->item = para_strdup(get_metadata_name(parent));
        tag->value = value;
-       tag->len = len;
        f->meta.count++;
        return 1;
 fail:
@@ -425,7 +420,7 @@ static int read_mdhd(struct mp4 *f)
                ret = read_int64(f, &t->duration);
                if (ret <= 0)
                        return ret;
-       } else { //version == 0
+       } else { /* version == 0 */
                uint32_t temp;
 
                skip_bytes(f, 8); /* creation time (4), modification time (4) */
@@ -442,7 +437,7 @@ static int read_mdhd(struct mp4 *f)
        return 1;
 }
 
-static int32_t read_ilst(struct mp4 *f, int32_t size)
+static int read_ilst(struct mp4 *f, int32_t size)
 {
        int ret;
        uint64_t sumsize = 0;
@@ -471,7 +466,7 @@ static int32_t read_ilst(struct mp4 *f, int32_t size)
        return 1;
 }
 
-static int32_t read_meta(struct mp4 *f, uint64_t size)
+static int read_meta(struct mp4 *f, uint64_t size)
 {
        int ret;
        uint64_t subsize, sumsize = 0;
@@ -571,6 +566,21 @@ static int parse_sub_atoms(struct mp4 *f, uint64_t total_size, bool meta_only)
        return 1;
 }
 
+void mp4_close(struct mp4 *f)
+{
+       free(f->track.stsz_table);
+       free(f->track.stts_sample_count);
+       free(f->track.stsc_first_chunk);
+       free(f->track.stsc_samples_per_chunk);
+       free(f->track.stco_chunk_offset);
+       for (uint32_t n = 0; n < f->meta.count; n++) {
+               free(f->meta.tags[n].item);
+               free(f->meta.tags[n].value);
+       }
+       free(f->meta.tags);
+       free(f);
+}
+
 static int open_file(const struct mp4_callback *cb, bool meta_only, struct mp4 **result)
 {
        int ret;
@@ -596,34 +606,37 @@ static int open_file(const struct mp4_callback *cb, bool meta_only, struct mp4 *
        ret = -E_MP4_TRACK;
        if (f->track.channel_count == 0)
                goto fail;
+       ret = -E_MP4_BAD_SAMPLERATE;
+       if (f->track.sample_rate == 0)
+               goto fail;
        *result = f;
        return 1;
 fail:
        *result = NULL;
-       free(f);
+       mp4_close(f);
        return ret;
 }
 
 int mp4_open_read(const struct mp4_callback *cb, struct mp4 **result)
 {
-       return open_file(cb, false, result);
-}
-
-void mp4_close(struct mp4 *f)
-{
-       int32_t i;
+       struct mp4 *f;
+       int ret;
 
-       free(f->track.stsz_table);
-       free(f->track.stts_sample_count);
-       free(f->track.stsc_first_chunk);
-       free(f->track.stsc_samples_per_chunk);
-       free(f->track.stco_chunk_offset);
-       for (i = 0; i < f->meta.count; i++) {
-               free(f->meta.tags[i].item);
-               free(f->meta.tags[i].value);
-       }
-       free(f->meta.tags);
-       free(f);
+       *result = NULL;
+       ret = open_file(cb, false, &f);
+       if (ret < 0)
+               return ret;
+       ret = -E_MP4_BAD_SAMPLE_COUNT;
+       if (f->track.stsz_sample_count == 0)
+               goto fail;
+       ret = -E_MP4_CORRUPT;
+       if (f->track.time_scale == 0)
+               goto fail;
+       *result = f;
+       return 1;
+fail:
+       mp4_close(f);
+       return ret;
 }
 
 static int32_t chunk_of_sample(const struct mp4 *f, int32_t sample,
@@ -631,15 +644,15 @@ static int32_t chunk_of_sample(const struct mp4 *f, int32_t sample,
 {
        const struct mp4_track *t = &f->track;
        uint32_t *fc = t->stsc_first_chunk, *spc = t->stsc_samples_per_chunk;
-       int32_t chunk1, chunk1samples, n, total, i;
+       uint32_t chunk1, chunk1samples, n, total, k;
 
-       for (i = 1, total = 0; i < t->stsc_entry_count; i++, total += n) {
-               n = (fc[i] - fc[i - 1]) * spc[i - 1]; /* number of samples */
+       for (k = 1, total = 0; k < t->stsc_entry_count; k++, total += n) {
+               n = (fc[k] - fc[k - 1]) * spc[k - 1]; /* number of samples */
                if (sample < total + n)
                        break;
        }
-       chunk1 = fc[i - 1];
-       chunk1samples = spc[i - 1];
+       chunk1 = fc[k - 1];
+       chunk1samples = spc[k - 1];
        if (chunk1samples != 0)
                *chunk = (sample - total) / chunk1samples + chunk1;
        else
@@ -656,12 +669,10 @@ uint64_t mp4_get_duration(const struct mp4 *f)
 {
        const struct mp4_track *t = &f->track;
 
-       if (t->time_scale == 0)
-               return 0;
        return t->duration * 1000 / t->time_scale;
 }
 
-int mp4_set_sample_position(struct mp4 *f, int32_t sample)
+int mp4_set_sample_position(struct mp4 *f, uint32_t sample)
 {
        const struct mp4_track *t = &f->track;
        int32_t offset, chunk, chunk_sample;
@@ -686,34 +697,32 @@ int mp4_set_sample_position(struct mp4 *f, int32_t sample)
        return 1;
 }
 
-int32_t mp4_get_sample_size(const struct mp4 *f, int sample)
+int mp4_get_sample_size(const struct mp4 *f, uint32_t sample, uint32_t *result)
 {
        const struct mp4_track *t = &f->track;
 
+       if (sample >= t->stsz_sample_count)
+               return -ERRNO_TO_PARA_ERROR(EINVAL);
        if (t->stsz_sample_size != 0)
-               return t->stsz_sample_size;
-       return t->stsz_table[sample];
+               *result = t->stsz_sample_size;
+       else
+               *result = t->stsz_table[sample];
+       return 1;
 }
 
-uint32_t mp4_get_sample_rate(const struct mp4 *f)
+uint16_t mp4_get_sample_rate(const struct mp4 *f)
 {
        return f->track.sample_rate;
 }
 
-uint32_t mp4_get_channel_count(const struct mp4 *f)
+uint16_t mp4_get_channel_count(const struct mp4 *f)
 {
        return f->track.channel_count;
 }
 
-int32_t mp4_num_samples(const struct mp4 *f)
+uint32_t mp4_num_samples(const struct mp4 *f)
 {
-       const struct mp4_track *t = &f->track;
-       int32_t i;
-       int32_t total = 0;
-
-       for (i = 0; i < t->stts_entry_count; i++)
-               total += t->stts_sample_count[i];
-       return total;
+       return f->track.stsz_sample_count;
 }
 
 int mp4_open_meta(const struct mp4_callback *cb, struct mp4 **result)
@@ -783,7 +792,7 @@ static void *modify_moov(struct mp4 *f, uint32_t *out_size)
 {
        int ret;
        uint64_t total_base = f->moov_offset + 8;
-       uint32_t total_size = (uint32_t) (f->moov_size - 8);
+       uint32_t total_size = f->moov_size - 8;
        uint32_t new_ilst_size = 0;
        void *out_buffer;
        uint8_t *p_out;
@@ -860,7 +869,7 @@ static int write_data(struct mp4 *f, void *data, size_t size)
        return 1;
 }
 
-int mp4_meta_update(struct mp4 *f)
+int mp4_update_meta(struct mp4 *f)
 {
        void *new_moov_data;
        uint32_t new_moov_size;
@@ -889,8 +898,9 @@ int mp4_meta_update(struct mp4 *f)
        ret = write_data(f, new_moov_data, new_moov_size);
        if (ret < 0)
                goto free_moov;
-       f->cb->truncate(f->cb->user_data);
-       ret = 1;
+       ret = f->cb->truncate(f->cb->user_data);
+       if (ret < 0)
+               ret = -ERRNO_TO_PARA_ERROR(errno);
 free_moov:
        free(new_moov_data);
        return ret;
@@ -909,10 +919,8 @@ free_moov:
  */
 char *mp4_get_tag_value(const struct mp4 *f, const char *item)
 {
-       uint32_t i;
-
-       for (i = 0; i < f->meta.count; i++)
-               if (!strcasecmp(f->meta.tags[i].item, item))
-                       return para_strdup(f->meta.tags[i].value);
+       for (unsigned n = 0; n < f->meta.count; n++)
+               if (!strcasecmp(f->meta.tags[n].item, item))
+                       return para_strdup(f->meta.tags[n].value);
        return NULL;
 }