add --moov-before-mdat

src/m4af.c

@@ -23,6 +23,7 @@
 
 #define m4af_realloc(memory,size) realloc(memory, size)
 #define m4af_free(memory) free(memory)
+#define m4af_max(a,b) ((a)<(b)?(b):(a))
 
 #define M4AF_ATOM_WILD  0xffffffff
 
@@ -596,12 +597,13 @@ int m4af_set_iTunSMPB(m4af_ctx_t *ctx)
 }
 
 static
-void m4af_update_box_size(m4af_ctx_t *ctx, int64_t pos)
+uint32_t m4af_update_box_size(m4af_ctx_t *ctx, int64_t pos)
 {
     int64_t current_pos = m4af_tell(ctx);
     m4af_set_pos(ctx, pos);
     m4af_write32(ctx, current_pos - pos);
     m4af_set_pos(ctx, current_pos);
+    return current_pos - pos;
 }
 
 static
@@ -1273,7 +1275,7 @@ void m4af_write_udta_box(m4af_ctx_t *ctx)
 }
 
 static
-void m4af_write_moov_box(m4af_ctx_t *ctx)
+uint32_t m4af_write_moov_box(m4af_ctx_t *ctx)
 {
     unsigned i;
     int64_t pos = m4af_tell(ctx);
@@ -1283,7 +1285,7 @@ void m4af_write_moov_box(m4af_ctx_t *ctx)
         m4af_write_trak_box(ctx, i);
     if (ctx->num_tags)
         m4af_write_udta_box(ctx);
-    m4af_update_box_size(ctx, pos);
+    return m4af_update_box_size(ctx, pos);
 }
 
 static
@@ -1301,10 +1303,35 @@ void m4af_finalize_mdat(m4af_ctx_t *ctx)
     m4af_set_pos(ctx, ctx->mdat_pos + ctx->mdat_size);
 }
 
-int m4af_finalize(m4af_ctx_t *ctx)
+static
+void m4af_shift_mdat_pos(m4af_ctx_t *ctx, uint32_t offset)
+{
+    unsigned i, j;
+    int64_t begin, end;
+    char buf[8192];
+
+    end = ctx->mdat_pos + ctx->mdat_size;
+    for (; (begin = m4af_max(ctx->mdat_pos, end - 8192)) < end; end = begin) {
+        m4af_set_pos(ctx, begin);
+        ctx->io.read(ctx->io_cookie, buf, end - begin);
+        m4af_set_pos(ctx, begin + offset);
+        m4af_write(ctx, buf, end - begin);
+    }
+    for (i = 0; i < ctx->num_tracks; ++i)
+        for (j = 0; j < ctx->track[i].num_chunks; ++j)
+            ctx->track[i].chunk_table[j].offset += offset;
+    ctx->mdat_pos += offset;
+    m4af_set_pos(ctx, ctx->mdat_pos - 16);
+    m4af_write_free_box(ctx, 0);
+    m4af_write(ctx, "\0\0\0\0mdat", 8);
+    m4af_finalize_mdat(ctx);
+}
+
+int m4af_finalize(m4af_ctx_t *ctx, int optimize)
 {
     unsigned i;
     m4af_track_t *track;
+    uint32_t moov_size;
 
     for (i = 0; i < ctx->num_tracks; ++i) {
         track = ctx->track + i;
@@ -1323,6 +1350,14 @@ int m4af_finalize(m4af_ctx_t *ctx)
         (track->encoder_delay || track->padding))
         m4af_set_iTunSMPB(ctx);
     m4af_finalize_mdat(ctx);
-    m4af_write_moov_box(ctx);
+    moov_size = m4af_write_moov_box(ctx);
+    if (optimize) {
+        int64_t pos;
+        m4af_shift_mdat_pos(ctx, moov_size + 1024);
+        m4af_set_pos(ctx, 32);
+        m4af_write_moov_box(ctx);
+        pos = m4af_tell(ctx);
+        m4af_write_free_box(ctx, ctx->mdat_pos - pos - 24);
+    }
     return ctx->last_error;
 }

src/m4af.h

@@ -87,7 +87,7 @@ m4af_ctx_t *m4af_create(uint32_t codec, uint32_t timescale,
 
 int m4af_begin_write(m4af_ctx_t *ctx);
 
-int m4af_finalize(m4af_ctx_t *ctx);
+int m4af_finalize(m4af_ctx_t *ctx, int optimize);
 
 void m4af_teardown(m4af_ctx_t **ctx);
 

src/main.c

@@ -154,6 +154,7 @@ PROGNAME " %s\n"
 "                                 2: Both\n"
 " --ignorelength                Ignore length of WAV header\n"
 " -S, --silent                  Don't print progress messages\n"
+" --moov-before-mdat            Place moov box before mdat box on m4a output\n"
 "\n"
 "Options for raw (headerless) input:\n"
 " -R, --raw                     Treat input as raw (by default WAV is\n"
@@ -206,6 +207,7 @@ typedef struct aacenc_param_ex_t {
     unsigned gapless_mode;
     unsigned ignore_length;
     int silent;
+    int moov_before_mdat;
 
     int is_raw;
     unsigned raw_channels;
@@ -223,6 +225,7 @@ int parse_options(int argc, char **argv, aacenc_param_ex_t *params)
     int ch;
     unsigned n;
 
+#define OPT_MOOV_BEFORE_MDAT     M4AF_FOURCC('m','o','o','v')
 #define OPT_RAW_CHANNELS         M4AF_FOURCC('r','c','h','n')
 #define OPT_RAW_RATE             M4AF_FOURCC('r','r','a','t')
 #define OPT_RAW_FORMAT           M4AF_FOURCC('r','f','m','t')
@@ -247,6 +250,7 @@ int parse_options(int argc, char **argv, aacenc_param_ex_t *params)
         { "gapless-mode",     required_argument, 0, 'G' },
         { "ignorelength",     no_argument,       0, 'I' },
         { "silent",           no_argument,       0, 'S' },
+        { "moov-before-mdat", no_argument,       0, OPT_MOOV_BEFORE_MDAT   },
 
         { "raw",              no_argument,       0, 'R' },
         { "raw-channels",     required_argument, 0, OPT_RAW_CHANNELS       },
@@ -357,6 +361,9 @@ int parse_options(int argc, char **argv, aacenc_param_ex_t *params)
         case 'S':
             params->silent = 1;
             break;
+        case OPT_MOOV_BEFORE_MDAT:
+            params->moov_before_mdat = 1;
+            break;
         case 'R':
             params->is_raw = 1;
             break;
@@ -580,7 +587,7 @@ int finalize_m4a(m4af_ctx_t *m4af, const aacenc_param_ex_t *params,
 
     put_tool_tag(m4af, params, encoder);
 
-    if (m4af_finalize(m4af) < 0) {
+    if (m4af_finalize(m4af, params->moov_before_mdat) < 0) {
         fprintf(stderr, "ERROR: failed to finalize m4a\n");
         return -1;
     }
@@ -647,7 +654,7 @@ int main(int argc, char **argv)
 {
     wav_io_context_t wav_io = { read_callback, seek_callback, tell_callback };
     m4af_io_callbacks_t
-        m4af_io = { 0, write_callback, seek_callback, tell_callback };
+        m4af_io = { read_callback, write_callback, seek_callback, tell_callback };
     aacenc_param_ex_t params = { 0 };
 
     int result = 2;
@@ -711,7 +718,7 @@ int main(int argc, char **argv)
         params.output_filename = output_filename;
     }
 
-    if ((ofp = aacenc_fopen(params.output_filename, "wb")) == 0) {
+    if ((ofp = aacenc_fopen(params.output_filename, "wb+")) == 0) {
         aacenc_fprintf(stderr, "ERROR: %s: %s\n", params.output_filename,
                        strerror(errno));
         goto END;

version.h

@@ -1,4 +1,4 @@
 #ifndef VERSION_H
 #define VERSION_H
-const char *fdkaac_version = "0.2.0";
+const char *fdkaac_version = "0.3.0";
 #endif