avformat/hls: remove redundant code

Reviewed-by: Jun Zhao <mypopydev@gmail.com>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

libavformat/hls.c

@@ -937,14 +937,8 @@ static struct segment *next_segment(struct playlist *pls)
     return pls->segments[n];
 }
 
-enum ReadFromURLMode {
-    READ_NORMAL,
-    READ_COMPLETE,
-};
-
 static int read_from_url(struct playlist *pls, struct segment *seg,
-                         uint8_t *buf, int buf_size,
-                         enum ReadFromURLMode mode)
+                         uint8_t *buf, int buf_size)
 {
     int ret;
 
@@ -952,12 +946,9 @@ static int read_from_url(struct playlist *pls, struct segment *seg,
     if (seg->size >= 0)
         buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
 
-    if (mode == READ_COMPLETE) {
-        ret = avio_read(pls->input, buf, buf_size);
-        if (ret != buf_size)
-            av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
-    } else
-        ret = avio_read(pls->input, buf, buf_size);
+    ret = avio_read(pls->input, buf, buf_size);
+    if (ret != buf_size)
+        av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
 
     if (ret > 0)
         pls->cur_seg_offset += ret;
@@ -1077,7 +1068,7 @@ static void intercept_id3(struct playlist *pls, uint8_t *buf,
     while (1) {
         /* see if we can retrieve enough data for ID3 header */
         if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
-            bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
+            bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len);
             if (bytes > 0) {
 
                 if (bytes == ID3v2_HEADER_SIZE - *len)
@@ -1129,7 +1120,7 @@ static void intercept_id3(struct playlist *pls, uint8_t *buf,
 
             if (remaining > 0) {
                 /* read the rest of the tag in */
-                if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
+                if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining) != remaining)
                     break;
                 id3_buf_pos += remaining;
                 av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
@@ -1143,7 +1134,7 @@ static void intercept_id3(struct playlist *pls, uint8_t *buf,
 
     /* re-fill buffer for the caller unless EOF */
     if (*len >= 0 && (fill_buf || *len == 0)) {
-        bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
+        bytes = read_from_url(pls, seg, buf + *len, buf_size - *len);
 
         /* ignore error if we already had some data */
         if (bytes >= 0)
@@ -1303,7 +1294,7 @@ static int update_init_section(struct playlist *pls, struct segment *seg)
     av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
 
     ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
-                        pls->init_sec_buf_size, READ_COMPLETE);
+                        pls->init_sec_buf_size);
     ff_format_io_close(pls->parent, &pls->input);
 
     if (ret < 0)
@@ -1498,7 +1489,7 @@ reload:
     }
 
     seg = current_segment(v);
-    ret = read_from_url(v, seg, buf, buf_size, READ_NORMAL);
+    ret = read_from_url(v, seg, buf, buf_size);
     if (ret > 0) {
         if (just_opened && v->is_id3_timestamped != 0) {
             /* Intercept ID3 tags here, elementary audio streams are required